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AIR CONDITIONING Automatic A/C Wiring Diagram, Front A/C (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Automatic A/C Wiring Diagram, Front A/C (1 of 2) for Chevrolet Silverado 2004 1500: (6.6l vin 1) (6.6l vin 2) (gasoline) 5v ref A/c comp cl rly ctrl A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c low pressure switch (right side of accumulator) A/c on A/c recirc A/c ref pre sens sig A/c refrigerant pressure sensor (in high side pressure line) A10 A11 A12 A5 c1 Amb air temp sig Ambient air temperature sensor (in right front bumper filler assembly Auto B c5 B(+) B10 B11 B12 Blower fuse 40a Blower motor (right side of dash) Blower motor control processor (behind right side of dash) Blower speed ctrl C4 e C5 c1 Class 2 ser data Class 2 serial data Fan dn Fan up Frt def G104 (on left rear of engine block) G200 (near right "a" pillar) G200 (near right side of dash, "a" pillar) G203 (near left "a" pillar) Ground Hot at all times Hot in run Hot in run or start Hvac 1 fuse 10a Hvac control module (behind center of dash) Hvac/ ecas fuse 10a I/p relay block (left side of dash) Ign 3 Ign e fuse 10a Inside air temp sig Inside air temperature sensor assembly (in headliner above driver) Inst lamp dim ctrl Interior lights system Left i/p fuse block (lower left side of dash) Left temp control Lo lt air temp sig Lo press sens sig Lo rt air temp sig Logic Low ref Lower left air temperature sensor (left end of hvac module) Lower right air temperature sensor (bottom of hvac module) Lt temp door ctrl Mode Mode door ctrl Off Powertrain control module or engine control module (left front of engine compt) Recir Recir door ctrl Recirc door po sig Red Right i/p fuse block (lower right side of dash) Right temp control Rt temp door ctrl S102 (in engine harness) S218 (in i/p harn) S345 Sp205 (in i/p harn) Speed ctrl Tan Temp sen ass ctrl Underhood fuse block (left side of engine compt, near battery) Up lt air temp sig Up rt air temp sig Upper left air temperature sensor (below dash trim panel) Upper right air temperature sensor (below dash trim panel) Automatic A/C Wiring Diagram, Front A/C (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Automatic A/C Wiring Diagram, Front A/C (2 of 2) for Chevrolet Silverado 2004 1500: Ambient light sens lo ref Ambient light sens sig Ambient light sensor B12 Body control module (lower left side of dash, below steering column) Class 2 serial data Left air temperature actuator (bottom of hvac module) Left solar sensor Left sunload sensor sig Logic Mode actuator (left side of hvac module) Recirculation actuator (upper right of hvac module) Right air temperature actuator (top of hvac module) Right i/p fuse block (lower right side of dash) Right solar sensor Right sunload sensor sig Sunload sensor assembly (top center of dash) Tan Compressor Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Compressor Wiring Diagram for Chevrolet Silverado 2004 1500: (6.6l vin 1) (6.6l vin 2) (gasoline) 5v ref A/c comp cl rly ctrl A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c low pressure switch (right side of accumulator) A/c on switch A/c ref pre sens sig A/c refrigerant pressure sensor (in high side pressure line) A12 B11 Class 2 ser data Class 2 serial data G104 (on left rear of engine compt) Hot at all times Hot in run or start Hvac control module (behind center of dash) Ign e fuse 10a Lo press sens sig Logic Low ref Powertrain control module or engine control module (left front of engine compt) Sp205 (in i/p harn) Underhood fuse block (left side of engine compt, near battery) Heater Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Heater Wiring Diagram for Chevrolet Silverado 2004 1500: 87a B c5 Blower fuse 40a Blower motor (under right side of dash) Blower motor control switch Blower motor relay Blower motor resistor assembly (on hvac module, near blower motor) G200 (near right "a" pillar) Hot at all times Hot in run Htr a/c fuse 30a Hvac control module (behind center of dash) Left i/p fuse block (lower left side of dash) Off Red Right i/p fuse block (lower right side of dash) Tan Underhood fuse block (left side of engine compt, near battery) Manual A/C Wiring Diagram, Front A/C (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Manual A/C Wiring Diagram, Front A/C (1 of 2) for Chevrolet Silverado 2004 1500: (6.6l vin 1) (6.6l vin 2) (gasoline) 5v ref 87a A/c comp cl rly ctrl A/c comp fuse 10a A/c compressor clutch A/c compressor clutch relay A/c low pressure switch (right side of accumulator) A/c on switch A/c recirc A/c ref pre sens sig A/c refrigerant pressure sensor (in high side pressure line) A10 A11 A12 A5 c1 B c5 B(+) B10 B11 B12 Blower fuse 40a Blower motor (under right side of dash) Blower motor control switch Blower motor relay Blower motor resistor assembly (on hvac module, near blower motor) Class 2 ser data Class 2 serial data Frt def G104 (on left rear of engine block) G200 (near right "a" pillar) G203 (near left "a" pillar) Ground Hot at all times Hot in run Hot in run or start Htr a/c fuse 30a Hvac 1 fuse 10a Hvac control module (behind center of dash) Hvac/ ecas fuse 10a I/p relay block (left side of dash) Ign 3 Ign e fuse 10a Inst lamp dim ctrl Interior lights system Left i/p fuse block (lower left side of dash) Left temp control Lo press sens sig Logic Low ref Lt temp door ctrl Mode control Mode door ctrl Off Off blow mt ctrl Powertrain control module or engine control module (left front of engine compt) Recir door ctrl Recirc switch Red Right i/p fuse block (lower right side of dash) Right temp control Rt temp door ctrl S102 (in engine harness) Sp205 (in i/p harn) Tan Underhood fuse block (left side of engine compt, near battery) Manual A/C Wiring Diagram, Front A/C (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Manual A/C Wiring Diagram, Front A/C (2 of 2) for Chevrolet Silverado 2004 1500: (not used) B12 Body control module (lower left side of dash, below steering column) Class 2 serial data G200 (near right "a" pillar) Left air temperature actuator (bottom of hvac module) Logic Mode actuator (left side of hvac module) Recirculation actuator (upper right of hvac module) Right air temperature actuator (top of hvac module) Right i/p fuse block (lower right side of dash) Tan ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram, GVW 8600 Lbs or Less for Chevrolet Silverado 2004 1500 List of elements for Anti-lock Brakes Wiring Diagram, GVW 8600 Lbs or Less for Chevrolet Silverado 2004 1500: Abs fuse 60a Anti-lock ind Brake fluid level sw in Brake fluid level switch (on left side of brake fluid reservoir) Brake fuse 10a Brake in Brake ind Brake input C12 C2 b7 C5 c1 C8 a Clutch start switch (m/t) (top of clutch clutch assy) Data link connector (dlc) (below steering column) Del torque Delivered torque Electronic brake control module (ebcm) (on left side of inner frame) Except seo G104 (left rear of engine block) G110 (left front body mount) G203 (hd: left side of fuel tank, exc hd: left front body mount) Hot at all times Hot in run Hot in run or start Ign e fuse 10a Ignition Instrument cluster Interior lights system Left front sensor (+) Left front sensor (-) Left front wheel speed sensor Left i/p fuse block (on lower left side of dash) Logic Nca Pnk Powertrain control module (pcm) (on left front of engine compt) Red Req torque Requested torque Right front sensor (+) Right front sensor (-) Right front wheel speed sensor S102 S213 Seo Seo ign fuse 10a Serial data Sp205 (in i/p harness) Stoplamp switch (on top of brake pedal bracket) Tan Tcc brake sw Trac sw input Traction control ind (if equipped) Traction control switch (if equipped) Transfer case shift control module Transmissions system Transmissions system (transfer case circuit) Underhood fuse block (at left side of eng compt, near battery) Underhood fuse block (at left side of engine compt) Vehicle speed sensor (vss) (4wd: on left side of transfer case, 2wd: right rear of transmission) Vss high Vss input Vss low Vss out ANTI-THEFT Forced Entry Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Forced Entry Wiring Diagram for Chevrolet Silverado 2004 1500: (inside driver door) (inside right front passenger door) (lower left side of dash, near steering column) A12 Ajar sw All times B12 Base Battery Body control module D12 Door ajar sw sig Door sw lo ref Driver door module Driver mini-wedge door jamb switch (rear of driver's door) Exterior lights system Front passenger door module Front passenger mini-wedge door jamb switch (rear of right front door) G200 (behind right side of dash) G203 (near left "a" pillar) G305 (bottom of left "b" pillar) G306 (bottom of right "b" pillar) Ground Headlights ctrl Headlights system Horn rly ctrl Horns system Hot at I/p relay block (near left kick panel) Key sw Key sw lo ref Key sw sig Left i/p fuse block (lower left side of dash) Left rear mini-wedge door jamb switch (crew cab) (rear or left rear door) Lf door ajar sw Lr door ajar sw Pk lamp rel Rf door ajar sw Right i/p fuse block (lower right side of dash) Right rear mini-wedge door jamb switch (crew cab) (rear or right rear door) Rr door ajar sw Serial data Splice pack sp205 (in i/p harness) Tan Tbc batt fuse 10a Underhood fuse block (left side of eng compt) Uplevel Passlock Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Passlock Wiring Diagram for Chevrolet Silverado 2004 1500: 12v reference A11 A12 B12 Battery Body control module (lower left side of dash, near steering column) Class 2 serial data D12 Data Data link connector (under left side of dash) Except 6.6l vin 2 6.6l vin 2 G203 (near left "a" pillar) Ground Hot at all times Hot in run & start I/p relay block (near left kick panel) Ign Ign 1 voltage Ign sw sig Ignition key alarm switch (on ignition key cylinder) Instrument panel cluster Key Lock cylinder Low reference Magnet Passlock sensor (internal to steering column) Pnk Powertrain control module (pcm) or engine conrtrol module (ecm) (on left front of engine compt) S217 (in steering column harness) Sec sens sig Security indicator Security sensor Serial data Splice pack sp205 (in i/p harn) Tamper sensor Tbc batt fuse 10a Tbc ign 1 fuse 10a Underhood fuse block (left side of eng compt) BODY CONTROL MODULES Body Control Modules Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Body Control Modules Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500: (base) (upper level) (bsae) (upper level) 12 volt ref A10 A11 A12 Ambient light sens sig Ambient light sensor Ambient light sensor (top center of dash) Anti-lock brakes system Anti-theft system B10 B11 B12 Battery + Body control module (on lower left side of dash, below steering column) Class 2 serial data Computer data lines system D12 Defogger system Dimming input/courtesy lmp pwm Dimming potentiometer 5volt ref Door locks system Driver door unlock rly ctrl Driver sunload sens sig Drl off ind Drl relay ctrl Drl sw sig E11 E12 Exterior lights system Fog light relay ctrl Front fog lamp sw sig G203 (behind left side of dash, near "a" pillar) Ground Ground distribution system Headlamp high beam relay ctrl Headlamp low beam relay ctrl Headlights system Horn rly ctrl Horns system Hot at all times I/p lamp dinning ctrl I/p relay block Interior lamp defeat sw sig Interior lights system L solar sensor Led dimming sig Left i/p fuse block Low ref Park lamp relay ctrl Park lamp sw on sig Pass door lock sw lock ctrl Pass door lock sw unlock ctrl Passenger sunload sens sig Pnk Power distribution system Power tops system R solar sensor Rear defog rly ctrl Red Remote radio ctrl sig Security system sens sig Sound system Steering wheel position sen sig Sunload sensor Tbc 2a fuse 15a Tbc 2c fuse 15a Tbc batt fuse 10a Tow/haul sw sig Tow/haul switch Underhood fuse block W/ automatic a/c W/ manual a/c Body Control Modules Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Body Control Modules Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500: (base) (crew cab) (up level) A10 A11 Accessory volt B11 B12 Backup lamp sig Battery + Body control module (on lower left side of dash, below steering column) Cargo lamp low ctrl Courtesy lamps on sig Door lock ctrl Door locks system Door unlock ctrl Exterior lights system Headlamp sw flash to pass sig Headlamp sw headlamp on sig Headlights system Hot at all times Hot in run & acc Hot in run & start Hot in run, start & acc I/p lamps dimmer sw low ref Ignition 0 volt Ignition 1 volt Interior lights system Key in ignition sw sig Left front door ajar sw sig Left i/p fuse block Left rear door ajar sw sig Low ref Park brake sw sig Park brake switch (part of park brake assembly) Pnk Power window lockout lr sig Power window lockout rr sig Power window sw lr down sig Power window sw lr up sig Power window sw rr down sig Power window sw rr up sig Power windows system Right front door ajar sw sig Right rear door ajar sw sig Tbc 2b fuse 15a Tbc accy fuse 10a Tbc ign 0 fuse 10a Tbc ign 1 fuse 10a Underhood fuse block Warnings system COMPUTER DATA LINES Computer Data Lines Wiring Diagram, Base & Up-Level for Chevrolet Silverado 2004 1500 List of elements for Computer Data Lines Wiring Diagram, Base & Up-Level for Chevrolet Silverado 2004 1500: (10/20 series) (30 series) (not used) B11 B12 Body control module (on lower left side of dash, below steering column) Cig ltr fuse 15a Data link connector (dlc) (under left side of dash, below steering column) Digital radio receiver (behind center of dash) Driver door module (ddm) (in left front door) Electronic brake control module (ebcm) (on left side of inner frame) Except 6.6l vin 2 6.6l vin 2 Front passenger door module (fpdm) (in right front door) G200 (near right "a" pillar) G203 (near left "a" pillar) Ground distribution system Hot at all times Hvac control module (behind center of dash) I/p relay block (under left side of dash, near kick panel) Inflatable restraint sensing/diagnostic module (under left front seat) Instrument panel cluster (ipc) Left i/p fuse block (under left side of dash) Memory seat module (underside of driver seat) Pnk Power distribution system Powertrain control module (pcm)/engine control module (ecm) (on left front of engine compt) Radio (at center of dash) Rear seat audio (rsa) controller (under rear of center console) Rear seat entertainment (rse) assembly (at center of headliner) Rear wheel steering control module (at left rear of vehicle, near spare tire bracket) Remote playback device-cd player (center of dash, below radio) Right i/p fuse block (under right side of dash) S202 Sp205 (in i/p harness) Sp207 (left side of dash) Tan Transfer case shift control module (behind headlamp switch) Transmission control module (at left front of eng compt) Underhood fuse block (at left side of engine compt, near battery) Vehicle communication interface module (vcim) (behind passenger air bag module) Computer Data Lines Wiring Diagram, Luxury for Chevrolet Silverado 2004 1500 List of elements for Computer Data Lines Wiring Diagram, Luxury for Chevrolet Silverado 2004 1500: (10/20 series) (30 series) (not used) Audio amplifier (under rear of center console) B10 B11 B12 Body control module (on lower left side of dash, below steering column) Cig ltr fuse 15a Data link connector (dlc) (under left side of dash, below steering column) Digital radio receiver (behind center of dash) Driver door module (ddm) (in left front door) Electronic brake control module (ebcm) (on left side of inner frame) Except 6.6l vin 2 6.6l vin 2 Front passenger door module (fpdm) (in right front door) G200 (near right "a" pillar) G203 (near left "a" pillar) Ground distribution system Hot at all times Hvac control module (behind center of dash) I/p relay block (under left side of dash, near kick panel) Inflatable restraint sensing/diagnostic module (under left front seat) Instrument panel cluster (ipc) Left i/p fuse block (under left side of dash) Memory seat module (underside of driver seat) Pnk Power distribution system Powertrain control module (pcm)/engine control module (ecm) (on left front of engine compt) Radio (at center of dash) Rear seat audio (rsa) controller (under rear of center console) Rear seat entertainment (rse) assembly (at center of headliner) Rear wheel steering control module (at left rear of vehicle, near spare tire bracket) Remote playback device-cd player (at center of dash, below radio) Right i/p fuse block (under right side of dash) S202 Sp205 (in i/p harness) Sp207 (left side of dash) Tan Transfer case shift control module (behind headlamp switch) Transmission control module (at left front of eng compt) Underhood fuse block (at left side of engine compt, near battery) Vehicle communication interface module (vcim) (behind passenger air bag module) CRUISE CONTROL 4.3L VIN X 4.3L VIN X, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500: A/t A10 Anti- lock brakes system Brake fuse 10a Class 2 data Clutch pedal position switch (top of clutch pedal) Clutch sw input Computer data lines system Cruise control module (left rear of engine compt, on firewall) Cruise control on/off switch Cruise engage in Cruise engage out Cruise fuse 10a Cruise ind Cruise on input D11 Exterior lights system F12 G203 (behind left side of dash) Ground Hot at all times Hot in run I/p relay block Ign Ignition Instrument panel cluster Left i/p fuse block (on lower left side of dash) M/t Nca Off Powertrain control module (left front of engine compt) Radio Resume/ accel Resume/accel Resume/accel sig S240 Serial data Set/ coast Set/coast sig Stop lps fuse 20a Stoplamp sw input Turn signal multifunction switch Underhood fuse block (near battery) Veh stop fuse 15a Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case) Vss high Vss in Vss low Vss out 4.8L VIN V 4.8L VIN V, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500: (not used) 5v ref A10 Acceleration pedal position sensor (behind accelerator pedal) App sensor 1 sig App sensor 2 sig Class 2 data Computer data lines system Cruise control on/off switch Cruise fuse 10a Cruise ind Cruise on sw sig Etc/ecm fuse 15a Exterior lights system F12 G104 (left rear of engine) Ground Hot at all times Hot in run Hot in run & start Ign Ign volt Instrument panel cluster Left i/p fuse block (on lower left side of dash) Low ref Nca Off Pnk Powertrain control module (left front of engine compt) Resume/ accel Resume/accel Resume/accel sig S102 S162 (w/ pto) (i/p harn) S240 Serial data Set/ coast Set/coast sig Stop lps fuse 20a Stoplamp switch (top of brake pedal) Tac motor cntrl 1 Tac motor cntrl 2 Tan Throttle actuator control module (left rear of engine compt) Throttle body Tp sensor 1 sig Tp sensor 2 sig Turn signal multifunction switch Under- hood fuse block Underhood fuse block (near battery) Veh stop fuse 15a Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case) Vss high Vss low 5.3L VIN T 5.3L VIN T, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500: (not used) 5v ref A10 Acceleration pedal position sensor (behind accelerator pedal) App sensor 1 sig App sensor 2 sig Class 2 data Computer data lines system Cruise control on/off switch Cruise fuse 10a Cruise ind Cruise on sw sig Etc/ecm fuse 15a Exterior lights system F12 G104 (left rear of engine) Ground Hot at all times Hot in run Hot in run & start Ign Ign volt Instrument panel cluster Left i/p fuse block (on lower left side of dash) Low ref Nca Off Pnk Powertrain control module (left front of engine compt) Resume/ accel Resume/accel Resume/accel sig S102 S162 (w/ pto) (i/p harn) S240 Serial data Set/ coast Set/coast sig Stop lps fuse 20a Stoplamp switch (top of brake pedal) Tac motor cntrl 1 Tac motor cntrl 2 Tan Throttle actuator control module (left rear of engine compt) Throttle body Tp sensor 1 sig Tp sensor 2 sig Turn signal multifunction switch Under- hood fuse block Underhood fuse block (near battery) Veh stop fuse 15a Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case) Vss high Vss low 5.3L VIN Z 5.3L VIN Z, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500: (not used) 5v ref A10 Acceleration pedal position sensor (behind accelerator pedal) App sensor 1 sig App sensor 2 sig Class 2 data Computer data lines system Cruise control on/off switch Cruise fuse 10a Cruise ind Cruise on sw sig Etc/ecm fuse 15a Exterior lights system F12 G104 (left rear of engine) Ground Hot at all times Hot in run Hot in run & start Ign Ign volt Instrument panel cluster Left i/p fuse block (on lower left side of dash) Low ref Nca Off Pnk Powertrain control module (left front of engine compt) Resume/ accel Resume/accel Resume/accel sig S102 S162 (w/ pto) (i/p harn) S240 Serial data Set/ coast Set/coast sig Stop lps fuse 20a Stoplamp switch (top of brake pedal) Tac motor cntrl 1 Tac motor cntrl 2 Tan Throttle actuator control module (left rear of engine compt) Throttle body Tp sensor 1 sig Tp sensor 2 sig Turn signal multifunction switch Under- hood fuse block Underhood fuse block (near battery) Veh stop fuse 15a Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case) Vss high Vss low 6.0L VIN U 6.0L VIN U, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN U, Cruise Control Wiring Diagram for Chevrolet Silverado 2004 1500: (not used) 5v ref A10 Acceleration pedal position sensor (behind accelerator pedal) App sensor 1 sig App sensor 2 sig Class 2 data Computer data lines system Cruise control on/off switch Cruise fuse 10a Cruise ind Cruise on sw sig Etc/ecm fuse 15a Exterior lights system F12 G104 (left rear of engine) Ground Hot at all times Hot in run Hot in run & start Ign Ign volt Instrument panel cluster Left i/p fuse block (on lower left side of dash) Low ref Nca Off Pnk Powertrain control module (left front of engine compt) Resume/ accel Resume/accel Resume/accel sig S102 S162 (w/ pto) (i/p harn) S240 Serial data Set/ coast Set/coast sig Stop lps fuse 20a Stoplamp switch (top of brake pedal) Tac motor cntrl 1 Tac motor cntrl 2 Tan Throttle actuator control module (left rear of engine compt) Throttle body Tp sensor 1 sig Tp sensor 2 sig Turn signal multifunction switch Under- hood fuse block Underhood fuse block (near battery) Veh stop fuse 15a Vehicle speed sensor (vss) (2wd: left side of transmission) (4wd: left side of transfer case) Vss high Vss low DEFOGGERS Heated Mirrors Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Heated Mirrors Wiring Diagram for Chevrolet Silverado 2004 1500: A7 c1 B11 Battery Computer data lines system Ddm fuse 15a Driver door module (ddm) (in driver's door) Driver outside rearview mirror F c3 Front passenger door module (fpdm) (in right front door) G200 (near right "a" pillar) Ground Hot at all times Hvac control module (in center of dash) Left i/p fuse block (lower left side of dash) Low ref Passenger outside rearview mirror Pdm fuse 10a R def Rear defog switch Right i/p fuse block (lower right side of dash) S202 Serial data Tan Rear Defogger Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Rear Defogger Wiring Diagram for Chevrolet Silverado 2004 1500: (except crewcab: right "b" pillar) (crewcab: near left "c" pillar) A c1 A c2 A6 c1 B11 B12 Body control module (on lower left side of dash) Computer data lines system G306 (except crewcab) g390 (crewcab) Hot at all times Hot in run & start Htr Hvac control module (in center of dash) I/p relay block (near left kick panel) Ign L c10 Logic Rear defog switch Rear defogger relay Rear window defogger grid Relay cntrl Serial data ELECTRONIC POWER STEERING Rear Wheel Steering Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Rear Wheel Steering Wiring Diagram for Chevrolet Silverado 2004 1500: 12v ref 2ws ind ctrl 4ws fuse 15a 4ws ind ctrl 5 volt ref 5v ref B+ volt B11 Base Body control module (on lower left side of dash, below steering column) C1 b5 C1 c5 Case gnd Case ground Combination yaw rate sensor/lateral accelerometer sensor (under front passenger seat) Computer data lines system Cruise fuse 10a D12 G101 G203 (near left "a" pillar) Gnd Hall a sig Hall b sig Hall c sig Hot at all times Hot in run I/p relay block (lower left side of dash) Ign 3 fuse 10a Ign 3 volt Instrument cluster system Interior lights system Lat accel sig Left i/p fuse block Low ref Mega fuse 125a Mode ind ctrl Mode sw sig Phase a ctrl Phase b ctrl Phase c ctrl Pnk Pos 1 sig Pos 2 sig Pos a sig Pos b sig Power distribution system Pulse sig Rear wheel position sensor (left rear of vehicle) Rear wheel steering control module (near spare tire bracket) Rear wheel steering mode select switch Red Rly gnd Rly volt S212 (in i/p harness) S240 (in steering pnk column harness) S241 (in steering column harness) Sens gnd Sens ref Sens sig Serial data Steering gear motor assembly (near spare tire bracket) Steering wheel speed/ position sensor (on steering column) Tan Tan c Underhood fuse block Underhood fuse holder Vss Yaw sens sig ELECTRONIC SUSPENSION Electronic Suspension Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Electronic Suspension Wiring Diagram for Chevrolet Silverado 2004 1500: (on spare tire hoist bracket) g401 (w/ heavy duty: left side of fuel tank) (w/o heavy duty: left front body mount) g302 G200 (near right "a" pillar) Hot in run and start I/p relay block I/p relay block (near left kick panel) Left front shock absorber solenoid (part of left front shock) Left rear shock absorber solenoid (part of left rear shock) Normal/ firm Pnk Right front shock absorber solenoid (part of right front shock) Right rear shock absorber solenoid (part of right rear shock) S140 S202 Selectable ride switch Seo ign fuse 10a Underhood fuse block (left side of engine compt) ENGINE PERFORMANCE 4.3L VIN X 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Silverado 2004 1500: (below steering column) data link connector (bottom front of engine) crankshaft position sensor (right rear of engine block) +5v 3-2 ss A/c system A12 Anti-lock brakes system B10 B12 Body control module (below steering column) Brk sw C10 Ckp sig Cls 2 data Clutch sw Cmp Coolant lev D10 E10 E11 Ect sig Engine oil pressure (eop) sensor G103 Gnd Ho2s hi Ho2s lo Hot at all times Hot in accy, run & start Hot in run & start Ign Ign 0 fuse 10a Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Inj1 fuse 15a Inj2 fuse 15a Injectors Left i/p fuse block Low ref Nca O2a fuse 15a O2b fuse 15a Oil lev Pcm1 fuse 15a Pcmb fuse 20a Pnk Pnk b Pnk d Pnk e Pnk h Pnk j Pnk l Powertrain control module (pcm) (left front of engine compt) Prnd a Prnd b Prnd p Range b Range c Red Ref low Rly ctrl S103 S110 Sens gnd Sensor sig Sp205 (in i/p harness) Starting system Tan Torque sig Underhood junction block 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Silverado 2004 1500: (left rear of engine) g104 (not used) Engine coolant level switch (in coolant reservoir) Engine coolant temperature sensor (rear side of left cylinder head) Engine oil level switch (right side of oil pan) Fuel pump & sender assembly (in fuel tank) Fuel pump relay G103 (right rear of engine) G104 (left rear of engine) G110 (left front body mount) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter) Hot at all times Knock sensor (rear of engine block) Nca Park/neutral position switch (left side of transmission) Pcm b fuse 20a Pnk Red S102 S103 S312 Tan Throttle position sensor (on throttle body assy) Under- hood fuse block 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Silverado 2004 1500: (in chassis harn) 1-2 sol 2-3 sol 3-2 sol A red A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a C12 Camshaft position sensor (in distributor) Clutch start switch (top of pedal bracket) Cruise control system E11 Evaporative emissions canister purge solenoid (right front side of engine) Evaporative emissions canister vent solenoid (right front side of fuel tank) Fuel tank pressure sensor (in fuel tank) G103 (right rear of engine) Gnd Hot in accy, run & start Hot in run Iat sensor Ign Ign0 fuse 10a Instrument cluster system Intake air temperature (iat)/mass airflow (maf) sensor (in air induction tube) Left i/p fuse block Manifold absolute pressure sensor (top rear of engine) N pnk P red Pc sol valve Pnk Pnk a Pnk d Power distribution system Red Red/ Rev S103 S150 Signal Stop- lamp switch (top of brake pedal bracket) Tan Tan b Tcc pwm sol Tcc sol Tft sensor Under- hood junction block Underhood fuse block Vehicle speed sensor (left rear of transmission) 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Silverado 2004 1500: (lower right front of eng block) 1-2 ss ctrl 2-3 ss ctrl 4wd low 4ws fuse 15a A/c clu A/c system Anti-lock brake system (speed signal) Anti-lock brakes system B11 Coil driver Coil wire Crank fuse 10a Crank voltage Cruise control system a/c system Cruise eng Distributor Evap vent ctrl Fld sig Front axle actuator (right side of center on axle housing) Frt axle sw Fuel lev Fuel sig ctrl G102 G103 (right rear of engine) Gen l Gnd Hot at all times Hot in run & start Hot in start Htr low ctrl Iac coil hi Iac coil lo Iat sig Ic timing ctrl Idle air control valve (on throttle body) Ign Ign feed Ignition coil Ignition control module (right rear of engine) Instrument cluster systems (speed signal) Instrument panel cluster Ipc/dic fuse 10a Logic Low ref Maf sig Malfunction indicator lamp Map sig Mil ctrl Oil press sig Pc sol hi Pc sol lo Pmp rly ctrl Pnk Pnk a Powertrain control module (pcm) (left front of engine compt) Prnd c Red Rpm out S103 Sens gnd Sens sig Sol ctrl Starting/ charging system Starting/charging system Sw sig Tan Tcc pwm Tcc sol ctrl Tft sens sig Timing Torque sig Tp sig Trans rng a Trans- missions system Transfer case shift control module (left front of transaxle case) Under- hood junction block Vss high Vss low Vss out 4.8L VIN V 4.8L VIN V, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500: (below steering column) data link connector (lower right rear of engine) crankshaft position (ckp) sensor +5v 3-2 ss ctrl A/c system Anti-lock brakes sys Body control module (below steering column) Brk sw sig C10 Ckp sig Cls 2 data Cmp sig Cpp sw sig D10 E10 E11 Ect sig Electronic suspension system Fuel comp sig G103 (right rear of engine) Gnd Ho2s hi sig Ho2s lo Hot at all times Hot in accy, run & start Hot in run & start Ign Ign 0 fuse 10a Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Inj 7 ctrl Inj 8 ctrl Inj1 fuse 15a Inj2 fuse 15a Injectors Ks signal Left i/p fuse block Lev sw sig Lift/dive sig O2a fuse 15a O2b fuse 15a Oil lev sw sig Pcmb fuse 20a Pnk Pnk a Powertrain control module (left front of engine compt) Prnd a sig Prnd b sig Prnd p sig Range b Range c Red Ref low Ref low (a/t) Req torq sig Rly ctrl S103 S110 Serial data Sp205 (in i/p harness) Starting/ charging system Tan Under- hood fuse block 4.8L VIN V, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500: (4l60) (4l80) (dual tanks) (in secondary fuel tank) fuel pump & sender assembly (secondary) (left rear of engine) g104 (not used) (right rear of engine) Coolant level switch (in coolant reservoir) Engine coolant temperature sensor (front of left cylinder head) Engine oil level switch (right side of oil pan) Fuel pump & sender assembly (primary) (in fuel tank) Fuel pump relay Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket) G103 G103 (right rear of engine) G104 (left rear of engine) G110 (left front body mount) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter) Hot at all times Hot in run & start Knock sensor (under intake manifold) Nca Park/neutral position switch (left side of transmission) Pcm b fuse 20a Pcm1 fuse 15a Pnk Red S102 S103 S312 Tan Under- hood fuse block Underhood fuse block 4.8L VIN V, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500: (4l60e) (4l60e) s 1-2 sol 2-3 sol 3-2 sol A red A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a C12 Camshaft position sensor (top center rear of engine) Engine oil pressure (eop) sensor (top rear of engine) Evaporative emissions (evap) canister purge solenoid (behind throttle body) Evaporative emissions canister vent solenoid (right front side of fuel tank) F12 Fuel tank pressure sensor (in fuel tank) Hot at all times Hot in run Instrument cluster system Left i/p fuse block Manifold absolute pressure sensor (top rear of engine) N pnk P red Pc sol valve Pnk Pnk a Red Red/ Rev S150 Stop lps fuse 20a Stop- lamp switch (top of brake pedal bracket) Tan Tcc pwm sol Tcc sol Tft sensor Under- hood fuse block Underhood fuse block Vehicle speed sensor (rear of transmission/ transfer case) 4.8L VIN V, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500: (behind accelerator pedal) accelerator pedal position sensor (in transmission) (4l80e) automatic transmission input shaft speed sensor 4ws fuse 15a A10 Act cntrl App sens 1 App sens 2 Cruise control system Cruise req Data E11 Ect/ecm fuse 15a Fuel composition sensor (flex fuel) G103 (right rear of engine) G104 (left rear of engine) Gnd Ground Hot at all times Hot in run & start Hot in run or start Iat sensor Ign Ign0 fuse 10a Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube) Left i/p fuse block Not used Pnk R/a input Red Ref low S/c input S102 S103 Signal Stp lp in Tac ctrl Tan Throttle actuator control module (rear of engine compt) Throttle body Tp sens 1 Tp sens 2 Underhood fuse block Veh stop fuse 15a 4.8L VIN V, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500: (in ignition coil jumper harness) (in injector jumper harness) (left rear of engine) g104 (left side of engine) g102 1-2 ss ctrl 2-3 ss ctrl 4wd low sig A/c system A12 Air conditioning system Anti-lock brakes system At iss high sig At iss low sig Axle sw sig B10 B11 Clu rly ctrl Crank fuse 10a Crank volt Css sig Ctrl Cycle sig Delivered torq Evap canp ctrl Evap vent ctrl Exc seo Fuel lev sens Fuel lev sig Fuel press sig G103 (right rear of engine) Gnd Ho2s htr low Ho2s low ctrl Hot at all times Hot in run & start Hot in start Iat sig Ign Ign ctrl Ign feed Ignition coils Ind ctrl Instrument cluster system Instrument panel cluster Ipc/dic fuse 10a Logic Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi ctrl Pc sol lo ctrl Pcm1 fuse 15a Pmp rly ctrl Pnk Pnk d Powertrain control module (left front of engine compt) Press sens sig Prnd c sig Red Red c Ref lo Ref low Rpm out S103 S151 S152 S153 S154 S157 Seo Seo b1 fuse 15a Spark plug Starting/charging system Tan Tcc pwm ctrl Tcc sol ctrl Tft sens sig Transmissions system Underhood fuse block Vss high sig Vss low sig Vss out 5.3L VIN T 5.3L VIN T, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500: (below steering column) data link connector (lower right rear of engine) crankshaft position (ckp) sensor +5v 3-2 ss ctrl A/c system Anti-lock brakes sys Body control module (below steering column) Brk sw sig C10 Ckp sig Cls 2 data Cmp sig Cpp sw sig D10 E10 E11 Ect sig Electronic suspension system Fuel comp sig G103 (right rear of engine) Gnd Ho2s hi sig Ho2s lo Hot at all times Hot in accy, run & start Hot in run & start Ign Ign 0 fuse 10a Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Inj 7 ctrl Inj 8 ctrl Inj1 fuse 15a Inj2 fuse 15a Injectors Ks signal Left i/p fuse block Lev sw sig Lift/dive sig O2a fuse 15a O2b fuse 15a Oil lev sw sig Pcmb fuse 20a Pnk Pnk a Powertrain control module (left front of engine compt) Prnd a sig Prnd b sig Prnd p sig Range b Range c Red Ref low Ref low (a/t) Req torq sig Rly ctrl S103 S110 Serial data Sp205 (in i/p harness) Starting/ charging system Tan Under- hood fuse block 5.3L VIN T, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500: (4l60) (4l80) (dual tanks) (in secondary fuel tank) fuel pump & sender assembly (secondary) (left rear of engine) g104 (not used) (right rear of engine) Coolant level switch (in coolant reservoir) Engine coolant temperature sensor (front of left cylinder head) Engine oil level switch (right side of oil pan) Fuel pump & sender assembly (primary) (in fuel tank) Fuel pump relay Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket) G103 G103 (right rear of engine) G104 (left rear of engine) G110 (left front body mount) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter) Hot at all times Hot in run & start Knock sensor (under intake manifold) Nca Park/neutral position switch (left side of transmission) Pcm b fuse 20a Pcm1 fuse 15a Pnk Red S102 S103 S312 Tan Under- hood fuse block Underhood fuse block 5.3L VIN T, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500: (4l60e) (4l60e) s 1-2 sol 2-3 sol 3-2 sol A red A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a C12 Camshaft position sensor (top center rear of engine) Engine oil pressure (eop) sensor (top rear of engine) Evaporative emissions (evap) canister purge solenoid (behind throttle body) Evaporative emissions canister vent solenoid (right front side of fuel tank) F12 Fuel tank pressure sensor (in fuel tank) Hot at all times Hot in run Instrument cluster system Left i/p fuse block Manifold absolute pressure sensor (top rear of engine) N pnk P red Pc sol valve Pnk Pnk a Red Red/ Rev S150 Stop lps fuse 20a Stop- lamp switch (top of brake pedal bracket) Tan Tcc pwm sol Tcc sol Tft sensor Under- hood fuse block Underhood fuse block Vehicle speed sensor (rear of transmission/ transfer case) 5.3L VIN T, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500: (behind accelerator pedal) accelerator pedal position sensor (in transmission) (4l80e) automatic transmission input shaft speed sensor 4ws fuse 15a A10 Act cntrl App sens 1 App sens 2 Cruise control system Cruise req Data E11 Ect/ecm fuse 15a Fuel composition sensor (flex fuel) G103 (right rear of engine) G104 (left rear of engine) Gnd Ground Hot at all times Hot in run & start Hot in run or start Iat sensor Ign Ign0 fuse 10a Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube) Left i/p fuse block Not used Pnk R/a input Red Ref low S/c input S102 S103 Signal Stp lp in Tac ctrl Tan Throttle actuator control module (rear of engine compt) Throttle body Tp sens 1 Tp sens 2 Underhood fuse block Veh stop fuse 15a 5.3L VIN T, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500: (in ignition coil jumper harness) (in injector jumper harness) (left rear of engine) g104 (left side of engine) g102 1-2 ss ctrl 2-3 ss ctrl 4wd low sig A/c system A12 Air conditioning system Anti-lock brakes system At iss high sig At iss low sig Axle sw sig B10 B11 Clu rly ctrl Crank fuse 10a Crank volt Css sig Ctrl Cycle sig Delivered torq Evap canp ctrl Evap vent ctrl Exc seo Fuel lev sens Fuel lev sig Fuel press sig G103 (right rear of engine) Gnd Ho2s htr low Ho2s low ctrl Hot at all times Hot in run & start Hot in start Iat sig Ign Ign ctrl Ign feed Ignition coils Ind ctrl Instrument cluster system Instrument panel cluster Ipc/dic fuse 10a Logic Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi ctrl Pc sol lo ctrl Pcm1 fuse 15a Pmp rly ctrl Pnk Pnk d Powertrain control module (left front of engine compt) Press sens sig Prnd c sig Red Red c Ref lo Ref low Rpm out S103 S151 S152 S153 S154 S157 Seo Seo b1 fuse 15a Spark plug Starting/charging system Tan Tcc pwm ctrl Tcc sol ctrl Tft sens sig Transmissions system Underhood fuse block Vss high sig Vss low sig Vss out 5.3L VIN Z 5.3L VIN Z, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500: (below steering column) data link connector (lower right rear of engine) crankshaft position (ckp) sensor +5v 3-2 ss ctrl A/c system Anti-lock brakes sys Body control module (below steering column) Brk sw sig C10 Ckp sig Cls 2 data Cmp sig Cpp sw sig D10 E10 E11 Ect sig Electronic suspension system Fuel comp sig G103 (right rear of engine) Gnd Ho2s hi sig Ho2s lo Hot at all times Hot in accy, run & start Hot in run & start Ign Ign 0 fuse 10a Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Inj 7 ctrl Inj 8 ctrl Inj1 fuse 15a Inj2 fuse 15a Injectors Ks signal Left i/p fuse block Lev sw sig Lift/dive sig O2a fuse 15a O2b fuse 15a Oil lev sw sig Pcmb fuse 20a Pnk Pnk a Powertrain control module (left front of engine compt) Prnd a sig Prnd b sig Prnd p sig Range b Range c Red Ref low Ref low (a/t) Req torq sig Rly ctrl S103 S110 Serial data Sp205 (in i/p harness) Starting/ charging system Tan Under- hood fuse block 5.3L VIN Z, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500: (4l60) (4l80) (dual tanks) (in secondary fuel tank) fuel pump & sender assembly (secondary) (left rear of engine) g104 (not used) (right rear of engine) Coolant level switch (in coolant reservoir) Engine coolant temperature sensor (front of left cylinder head) Engine oil level switch (right side of oil pan) Fuel pump & sender assembly (primary) (in fuel tank) Fuel pump relay Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket) G103 G103 (right rear of engine) G104 (left rear of engine) G110 (left front body mount) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter) Hot at all times Hot in run & start Knock sensor (under intake manifold) Nca Park/neutral position switch (left side of transmission) Pcm b fuse 20a Pcm1 fuse 15a Pnk Red S102 S103 S312 Tan Under- hood fuse block Underhood fuse block 5.3L VIN Z, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500: (4l60e) (4l60e) s 1-2 sol 2-3 sol 3-2 sol A red A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a C12 Camshaft position sensor (top center rear of engine) Engine oil pressure (eop) sensor (top rear of engine) Evaporative emissions (evap) canister purge solenoid (behind throttle body) Evaporative emissions canister vent solenoid (right front side of fuel tank) F12 Fuel tank pressure sensor (in fuel tank) Hot at all times Hot in run Instrument cluster system Left i/p fuse block Manifold absolute pressure sensor (top rear of engine) N pnk P red Pc sol valve Pnk Pnk a Red Red/ Rev S150 Stop lps fuse 20a Stop- lamp switch (top of brake pedal bracket) Tan Tcc pwm sol Tcc sol Tft sensor Under- hood fuse block Underhood fuse block Vehicle speed sensor (rear of transmission/ transfer case) 5.3L VIN Z, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500: (behind accelerator pedal) accelerator pedal position sensor (in transmission) (4l80e) automatic transmission input shaft speed sensor 4ws fuse 15a A10 Act cntrl App sens 1 App sens 2 Cruise control system Cruise req Data E11 Ect/ecm fuse 15a Fuel composition sensor (flex fuel) G103 (right rear of engine) G104 (left rear of engine) Gnd Ground Hot at all times Hot in run & start Hot in run or start Iat sensor Ign Ign0 fuse 10a Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube) Left i/p fuse block Not used Pnk R/a input Red Ref low S/c input S102 S103 Signal Stp lp in Tac ctrl Tan Throttle actuator control module (rear of engine compt) Throttle body Tp sens 1 Tp sens 2 Underhood fuse block Veh stop fuse 15a 5.3L VIN Z, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500: (in ignition coil jumper harness) (in injector jumper harness) (left rear of engine) g104 (left side of engine) g102 1-2 ss ctrl 2-3 ss ctrl 4wd low sig A/c system A12 Air conditioning system Anti-lock brakes system At iss high sig At iss low sig Axle sw sig B10 B11 Clu rly ctrl Crank fuse 10a Crank volt Css sig Ctrl Cycle sig Delivered torq Evap canp ctrl Evap vent ctrl Exc seo Fuel lev sens Fuel lev sig Fuel press sig G103 (right rear of engine) Gnd Ho2s htr low Ho2s low ctrl Hot at all times Hot in run & start Hot in start Iat sig Ign Ign ctrl Ign feed Ignition coils Ind ctrl Instrument cluster system Instrument panel cluster Ipc/dic fuse 10a Logic Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi ctrl Pc sol lo ctrl Pcm1 fuse 15a Pmp rly ctrl Pnk Pnk d Powertrain control module (left front of engine compt) Press sens sig Prnd c sig Red Red c Ref lo Ref low Rpm out S103 S151 S152 S153 S154 S157 Seo Seo b1 fuse 15a Spark plug Starting/charging system Tan Tcc pwm ctrl Tcc sol ctrl Tft sens sig Transmissions system Underhood fuse block Vss high sig Vss low sig Vss out 6.0L VIN N 6.0L VIN N, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Engine Performance Wiring Diagram (1 of 5) for Chevrolet Silverado 2004 1500: (below steering column) data link connector (lower right rear of engine) crankshaft position (ckp) sensor +5v 3-2 ss ctrl A/c system Anti-lock brakes sys Body control module (below steering column) Brk sw sig C10 Ckp sig Cls 2 data Cmp sig Cpp sw sig D10 E10 E11 Ect sig Electronic suspension system Fuel comp sig G103 (right rear of engine) Gnd Ho2s hi sig Ho2s lo Hot at all times Hot in accy, run & start Hot in run & start Ign Ign 0 fuse 10a Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Inj 7 ctrl Inj 8 ctrl Inj1 fuse 15a Inj2 fuse 15a Injectors Ks signal Left i/p fuse block Lev sw sig Lift/dive sig O2a fuse 15a O2b fuse 15a Oil lev sw sig Pcmb fuse 20a Pnk Pnk a Powertrain control module (left front of engine compt) Prnd a sig Prnd b sig Prnd p sig Range b Range c Red Ref low Ref low (a/t) Req torq sig Rly ctrl S103 S110 Serial data Sp205 (in i/p harness) Starting/ charging system Tan Under- hood fuse block 6.0L VIN N, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Engine Performance Wiring Diagram (2 of 5) for Chevrolet Silverado 2004 1500: (4l60) (4l80) (dual tanks) (in secondary fuel tank) fuel pump & sender assembly (secondary) (left rear of engine) g104 (not used) (right rear of engine) Coolant level switch (in coolant reservoir) Engine coolant temperature sensor (front of left cylinder head) Engine oil level switch (right side of oil pan) Fuel pump & sender assembly (primary) (in fuel tank) Fuel pump relay Fuel pump relay (secondary) (dual tanks) (on underhood fuse block bracket) G103 G103 (right rear of engine) G104 (left rear of engine) G110 (left front body mount) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, before converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, after converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, before converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, after converter) Hot at all times Hot in run & start Knock sensor (under intake manifold) Nca Park/neutral position switch (left side of transmission) Pcm b fuse 20a Pcm1 fuse 15a Pnk Red S102 S103 S312 Tan Under- hood fuse block Underhood fuse block 6.0L VIN N, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Engine Performance Wiring Diagram (3 of 5) for Chevrolet Silverado 2004 1500: (4l60e) (4l60e) s 1-2 sol 2-3 sol 3-2 sol A red A/t fluid pressure manual valve position switch Automatic transaxle Brake fuse 10a C12 Camshaft position sensor (top center rear of engine) Engine oil pressure (eop) sensor (top rear of engine) Evaporative emissions (evap) canister purge solenoid (behind throttle body) Evaporative emissions canister vent solenoid (right front side of fuel tank) F12 Fuel tank pressure sensor (in fuel tank) Hot at all times Hot in run Instrument cluster system Left i/p fuse block Manifold absolute pressure sensor (top rear of engine) N pnk P red Pc sol valve Pnk Pnk a Red Red/ Rev S150 Stop lps fuse 20a Stop- lamp switch (top of brake pedal bracket) Tan Tcc pwm sol Tcc sol Tft sensor Under- hood fuse block Underhood fuse block Vehicle speed sensor (rear of transmission/ transfer case) 6.0L VIN N, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Engine Performance Wiring Diagram (4 of 5) for Chevrolet Silverado 2004 1500: (behind accelerator pedal) accelerator pedal position sensor (in transmission) (4l80e) automatic transmission input shaft speed sensor 4ws fuse 15a A10 Act cntrl App sens 1 App sens 2 Cruise control system Cruise req Data E11 Ect/ecm fuse 15a Fuel composition sensor (flex fuel) G103 (right rear of engine) G104 (left rear of engine) Gnd Ground Hot at all times Hot in run & start Hot in run or start Iat sensor Ign Ign0 fuse 10a Intake air temperature (iat)/ mass airflow (maf) sensor (in air induction tube) Left i/p fuse block Not used Pnk R/a input Red Ref low S/c input S102 S103 Signal Stp lp in Tac ctrl Tan Throttle actuator control module (rear of engine compt) Throttle body Tp sens 1 Tp sens 2 Underhood fuse block Veh stop fuse 15a 6.0L VIN N, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Engine Performance Wiring Diagram (5 of 5) for Chevrolet Silverado 2004 1500: (in ignition coil jumper harness) (in injector jumper harness) (left rear of engine) g104 (left side of engine) g102 1-2 ss ctrl 2-3 ss ctrl 4wd low sig A/c system A12 Air conditioning system Anti-lock brakes system At iss high sig At iss low sig Axle sw sig B10 B11 Clu rly ctrl Crank fuse 10a Crank volt Css sig Ctrl Cycle sig Delivered torq Evap canp ctrl Evap vent ctrl Exc seo Fuel lev sens Fuel lev sig Fuel press sig G103 (right rear of engine) Gnd Ho2s htr low Ho2s low ctrl Hot at all times Hot in run & start Hot in start Iat sig Ign Ign ctrl Ign feed Ignition coils Ind ctrl Instrument cluster system Instrument panel cluster Ipc/dic fuse 10a Logic Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi ctrl Pc sol lo ctrl Pcm1 fuse 15a Pmp rly ctrl Pnk Pnk d Powertrain control module (left front of engine compt) Press sens sig Prnd c sig Red Red c Ref lo Ref low Rpm out S103 S151 S152 S153 S154 S157 Seo Seo b1 fuse 15a Spark plug Starting/charging system Tan Tcc pwm ctrl Tcc sol ctrl Tft sens sig Transmissions system Underhood fuse block Vss high sig Vss low sig Vss out EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Back-up Lamps Wiring Diagram for Chevrolet Silverado 2004 1500: (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab) (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount) (left side of transmission) back-up lamp switch (near left kick panel) i/p relay block A/t A11 B/u lmp vlt B/u lmps sig B/u lp fuse 20a Back-up alarm Body control module (bcm) (on lower left side of dash, below steering column) F10 G302 g401 g403 G403 (on left rear body mount) Hot in run or start Left back-up lamp M/t Park/neutral position (pnp) switch (left side of transmission) Pnk Rear lamps junction block Right back-up lamp Trailer connector Trlr b/u fuse 10a Underhood fuse block (left side of eng compt) Exterior Lamps Wiring Diagram (1 of 3) for Chevrolet Silverado 2004 1500 List of elements for Exterior Lamps Wiring Diagram (1 of 3) for Chevrolet Silverado 2004 1500: (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab) (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount) Anl/ Auto Back-up lamps circuit Body control module (bcm) (on lower left side of dash, below steering column) C2 b2 Computer data lines system D10 Drl Emergency vehicle roof lamp relay F11 Frt park fuse 10a G100 (lower left radiator support) G200 (behind right side of dash, near right "a" pillar) G203 (behind left side of dash, near left "a" pillar) G302 g401 g403 G403 (on left rear body mount) Hazard switch Head Headlamp switch Hot at all times Hot in run and start I/p relay block Ign e fuse 10a Left Left front marker lamp Left front park/ turn signal lamp Park Park lamp relay Pnk Prk lmp on Prk lmp rly Red Right Right front marker lamp Right front park/ turn signal lamp S100 S101 S215 S217 Serial data Stud 1 fuse 40a Stud 2 fuse 30a To trl park fuse (diagram 2 0f 3) Trailer connector Turn signal/ multi- function switch Under- hood fuse block (on left side of engine compt) Exterior Lamps Wiring Diagram (2 of 3) for Chevrolet Silverado 2004 1500 List of elements for Exterior Lamps Wiring Diagram (2 of 3) for Chevrolet Silverado 2004 1500: (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab) (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount) (behind right side of dash, near right "a" pillar) g200 (in brake clutch harn) (w/ roof marker lamps) (w/ pto) A c3 A left rear marker lamp b A12 Beacon lighting C1 b C1 d C1 g C1 h C2 d C3 b6 C3 h C4 f C6 right i/p fuse block Clearance lamps D12 E11 F12 From a frt park fuse (diagram 1 0f 3) G302 g401 g403 G304 (except crewcab) (under right front seat) G305 (crewcab) (on left "b" pillar) Hot at all times I/p relay block Int park fuse 10a Interior lights system Left license lamp Left rear turn signal Left roof marker lamp Left tail/ stop- lamp Lr park fuse 10a Rear lamps junction block Red Right i/p fuse block Right license lamp Right rear marker lamp Right rear turn signal Right roof marker lamp Right tail/ stop- lamp Roof beacon relay (at lower left "b" pillar Roof beacon switch Rr park fuse 10a S200 (at roof marker harness) S201 (at roof marker harness) S205 S206 (in i/p harn) S215 S219 Seo b1 fuse 15a Seo b2 fuse 30a Stop lp fuse 25a Stop- lamp switch Trl park fuse 15a Under- hood fuse block (on left side of engine compt) Vehicle roof lamp lighting W/ emergency W/ roof Exterior Lamps Wiring Diagram (3 of 3) for Chevrolet Silverado 2004 1500 List of elements for Exterior Lamps Wiring Diagram (3 of 3) for Chevrolet Silverado 2004 1500: (behind right side of dash, near right "a" pillar) (w/ level 3 convenience package) A11 Battery C10 C3 e1 Center high mounted stop lamp (chmsl) Computer data lines system D10 Driver door module (ddm) (in driver's door) Driver outside rearview mirror E10 Ext- erior illum lamp F10 Flash fuse 25a Front passenger door module (fpdm) (in right front door) G200 G200 (behind right side of dash, near right "a" pillar) G203 (behind left side of dash, near left "a" pillar) Ground Hazard sw Hot at all times I/p relay block I/p relay block (near left kick panel) Instrument panel cluster (ipc) Left i/p fuse block (on lower left side of dash) Left turn ind Logic Lr lamp volt Lt door lmp gnd Lt door lmp pwr Lt trlr st/trn fuse 10a Lt turn fuse 10a Lt turn sig Lt turn sig volt Nca Passenger outside rearview mirror Red Right i/p fuse block Right turn ind Rr lamp volt Rt door lmp gnd Rt door lmp pwr Rt trlr st/trn fuse 10a Rt turn fuse 10a Rt turn sig Rt turn sig volt S202 Serial data Stoplamp sw Tan Turn ind Turn signal/flasher module Under- hood fuse block Veh chmsl fuse 10a Veh stop fuse 15a GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Chevrolet Silverado 2004 1500 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Chevrolet Silverado 2004 1500: (6.6l vin 1) (6.6l vin 2) (in forward lamp harness) (w/ allison) transmission control module 4.3l engine 5.3l flex fuel A/c compressor clutch A/c low pressure switch Auxiliary battery relay Battery (left) Battery (right) Brake fluid level switch Brake pressure differential switch Coolant level switch Daytime running lamp (drl) (left) Daytime running lamp (drl) (right) Diesel Engine control module Except 4.3l base Except 4.3l engine F/pmp relay Fog lamp (left) Fog lamp (right) Fuel composition sensor G100 (lower left radiator support) G102 (diesel) (right side of engine block) G102 (gas) (4.3l: lower right front of engine block) (except 4.3l: left side of engine block) G104 (left rear of engine block) G106 (right front of engine block) G107 Gas Gas exc 4.3l Gas w/aux battery High beam headlamp (left) High beam headlamp (right) Horn (left) Horn (right) Ign 1 relay (gas) Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module Low beam headlamp (left) Low beam headlamp (right) Mobile radio fuse block Park/ neutral position switch Park/turn signal lamp (left front) Park/turn signal lamp (right front) S102 (in engine harness) S104 (in engine harness) S107 S156 (in engine harness) S157 (in engine harness) S223 (in seo harness) Throttle actuator control module Underhood fuse block (left side of engine compt) Upfitter option W/ dual horns W/aux battery W/pto Washer fluid level sensor Windshield washer fluid pump Ground Distribution Wiring Diagram (2 of 4) for Chevrolet Silverado 2004 1500 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Chevrolet Silverado 2004 1500: (exc flex fuel) c (flex fuel) (upfitter option) roof beacon relay (upfitter option) roof mounted beacon (w/ allison) transmission control module Active & elect shift transfer case Active & manual shift transfer case C1 a C2 a C2 d C3 a Crew cab Diesel Dual tanks Electronic brake control module Engine oil level switch Exc 8.1l w/o calif lev Except crew cab Front axle actuator Fuel heater sensor Fuel injector control module Fuel pump Fuel pump & sender assembly (secondary) G101 G103 (diesel) (right rear of engine block) G103 (gas) (right rear of engine block) G108 (diesel) (lower left side of engine) G109 (diesel) (left side of engine block) G110 (left front body mount) G304 (except crew cab) (under right front seat) G305 (crew cab) (left "b" pillar) G306 (on right "b" pillar) G390 (near "c" pillar) Gas Glow plug relay Inflatable restraint passenger presense module Inflatable restraint sensing & diagnostic module Intake air temperature (iat)/mass airflow (maf) sensor Manual shift transfer case Memory seat module (driver) Mini wedge (door jamb switch) (left rear) Mini wedge (door jamb switch) (right rear) Nca Park/ neutral position switch Powertrain control module Rear wheel steering control module Rear window defogger grid S103 (in engine harness) S110 (in engine harness) S329 (in passenger seat harness) Seat adjuster switch (passenger) Seat bolster/ lumbar switch (passenger) Transfer case shift control motor Transfer case shift control switch Water in fuel sensor Window switch (right rear) Window switch) (left rear) Ground Distribution Wiring Diagram (3 of 4) for Chevrolet Silverado 2004 1500 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Chevrolet Silverado 2004 1500: (2500 hd, 3500 w/o crew cab) (1500, 2500) (3500 w/ crew cab) (2500 hd, 3500 w/o crew cab: left side of fuel tank) (1500, 2500: on spare tire hoist bracket) (3500 w/ crew cab: on left rear body mount) (base) window/ door lock switch (driver) (base) window/ door lock switch (passenger) (crew cab) backup alarm (except luxury) (if equipped) left front shock absorber solenoid (if equipped) right front shock absorber solenoid (left front) (left rear) (luxury) rear seat entertainment assembly (luxury) vehicle communication interface module (right front) (right rear) (tail gate) A12 Audio amplifier B12 Backup lamp (left) Backup lamp (right) Body control module C (gmc) C1 2c C1 a8 C1 c5 C1 d10 C1 e C2 a C2 b6 C3 b6 Chevy Clearance lamps Column shift Cruise control module Data link connector Digital radio receiver E (chevy) Four wheel steering From i/p relay block a (diagram 3 of 4) G203 (near left "a" pillar) G302 g401 g403 Gmc Hazard lamps switch Headlamp switch Hvac control module I/p relay block (near left kick panel) Ignition key alarm switch Inflatable restraint steering wheel module coil Instrument panel cluster Left i/p fuse block (lower left side of dash) License lamp (left) License lamp (right) Luxury Multi- function accessory switch Nca Radio Rear lamps junction block (inside of left rear frame rail) Rear seat audio controller Rear seat entertainment assembly Remote playback device (cd player) Right i/p fuse block (lower right side of dash) S213 (in i/p harness) S216 (in steering column harness) S217 (in steering column harn) S423 S424 Steering wheel dic controls Steering wheel speed/ position sensor Stop/turn signal lamp (right) Stop/turn signal lamp) (left) Tail/stop lamp (left) Tail/stop lamp (right) To i/p relay block (diagram 3 of 4) Tow/haul switch Traction control switch Trailer connector Transfer case shift control module Transmission shift select switch Turn signal hazard flasher module Turn signal/ multifunction switch Vehicle communication interface module Windshield wiper/washer switch Ground Distribution Wiring Diagram (4 of 4) for Chevrolet Silverado 2004 1500 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Chevrolet Silverado 2004 1500: (auto a/c) air temp sensor assembly (inside front) (auto a/c) air temp sensor assembly (inside rear) (base) driver unlock relay (except bose or luxury) auxiliary power outlet (front) (except bose or luxury) cigar lighter (if equipped) inflatable restraint disable switch (if equipped) power takeoff switch (if equipped) selectable ride switch (luxury) garage door opener (not used) (upfitter option) emergency vehicle roof lamp relay (upfitter option) roof beacon switch (upfitter option) wrecker relay (w conv package) driver door module (w conv package) passenger door module (w/o conv package) mini wedge door jamb switch (driver) (w/o conv package) mini wedge door jamb switch (passenger) (w/o conv package) window/ door lock switch (driver) (w/o conv package) window/ door lock switch (passenger) A/t shift lock solenoid A12 Auto a/c Auxiliary power outlet (bin) Auxiliary power outlet (console) Auxiliary power outlet (front) Blower motor Blower motor resistor assembly Bose exc luxury C1 6c C1 a C1 b9 C1 d9 C1 f6 C3 c C4 a C5 e C7 f C8 f C9 a Center high mounted stop lamp Cigar lighter Clearance lamps Data link connector Dome lamp (front) Dome/ reading lamp (rear) G200 (behind right side of dash, near right "a" pillar) Headlamp switch Hvac control module I/p relay block (below left side of dash, left of steering column) Inside rearview mirror Instrument panel cluster Left i/p fuse block (lower left side of dash) Lock relay Luxury Man a/c Rear wheel steering switch Recirculation actuator Right i/p fuse block (lower right side of dash) Roof marker lamp (left) Roof marker lamp (right) S205 S215 (in brake clutch harness) S345 Transfer case shift control switch Unlock relay Vanity mirror lamp (left) Vanity mirror lamp (right) Windshield wiper motor module HEADLIGHTS Headlights Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Headlights Wiring Diagram for Chevrolet Silverado 2004 1500: (w/ cj2) (w/ t89) (w/o cj2) (w/o t89) A12 Ambient light sensor (on top center of dash) Ambient lt sens Anl/drl defeat Auto Body control module (bcm) (on lower left side of dash, below steering column) Drl fuse 10a Drl relay Drl rly ctrl Drl sw sig Flash to pass Fog lamp switch Fog lp fuse 15a Fog lp relay Fog lp rly ctrl Fog lp sw sig G100 (on lower left radiator support) G104 (left rear of engine block) G203 (near left "a" pillar) Hdlp dim sw sig Hdlp hi bm relay Hdlp lo bm relay Head Headlamp switch Hi bm rly ctrl Hi hdlp lt fuse 10a Hi hdlp rt fuse 10a Hi/lo beam select Hlps on sig Hot at all times I/p relay block (near left kick panel) Interior lights system Left daytime running lamp Left front fog lamp Left high beam head- lamp Left low beam head- lamp Lo bm rly ctrl Lo hdlp lt fuse 10a Lo hdlp rt fuse 10a Low ref Multifunction accessory switch Park Park brake switch (part of park brake assembly) Pk brake sig Right daytime running lamp Right front fog lamp Right high beam head- lamp Right low beam head- lamp S100 S101 S107 S213 Turn signal multifunction switch Underhood fuse block (left side of engine compt) HORN Horn Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Horn Wiring Diagram for Chevrolet Silverado 2004 1500: (left side of engine compartment) C2 body control module (in center console) G100 (left radiator support bracket) Horn fuse 15a Horn relay Horn switch Hot at all times Left horn (left side of radiator support) Right horn (right side of radiator support) S101 S10o Underhood fuse block INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500: (diesel only) A10 A11 A12 Abs ind Air bag ind B10 B11 B12 Battery Battery ind Body control module (bcm) (on lower left side of dash, below steering column) Brake Brake ind C1 lamp Cargo lamp ind Class 2 data Computer data lines Coolant temp gauge Cruise ind Dic fuel sig Dic mode sw Dic sw sig Dic toggle sw Eng speed sig Except seo Exterior lights system Fuel gauge G100 (on lower left of radiator support) G200 (behind right side of dash, near right "a" pillar) G203 (behind left side of dash, near left "a" pillar) Ground High beam ind Hot at all times Hot in run or start Hour meter I/p dim I/p relay block (near left kick panel) Ign e fuse 10a Ignition Illumination Instrument panel cluster Ipc serial data Ipc/dic fuse 10a Left turn Left turn ind Lo wash fluid Low fuel ind Message display Mil cntrl Odometer Oil gauge Orn Overdrive off ind Pnk Prnd321 Red Right turn Right turn ind S100 S202 Seat belt ind Security ind Seo Seo b1 fuse 15a Seo ign fuse 10a Service 4wd ind Soon ind (mil) service engine Speedometer Tachometer Tire pressure ind Tow/haul ind Traction control ind Transmission temp gauge Trip Trip reset Underhood fuse block (left side of engine compt) Upshift ind Variable dimming Volts gauge Vss Wait to start Wait to start ind (diesel only) Washer fluid level sensor (in washer fluid reservoir) Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500: (at left rear of vehicle, near spare tire bracket) (w/ 4 wheel steering) rear wheel steering control module (diesel only) (left rear of engine compt) (gas only, w/ auto cruise control) cruise control module (ccm) (near left kick panel) i/p relay block (on left front of engine compt) (diesel) engine control module (ecm) (w/ luxury package) radio 5 volt ref 5.3l flex fuel A10 Class 2 data Computer data lines Coolant level switch (in coolant reservoir) Coolnt lev sig Diesel Diesel (6.6 vin 1) Diesel (6.6 vin 2) Eng speed sig Engine controls system Engine oil level switch (on oil pan) Engine oil pressure sensor (on top rear of engine) Except 5.3l flex fuel Fuel Fuel lev sens Fuel level sensor (primary) (inside fuel tank) Fuel level sensor (secondary) (inside fuel tank) G103 (on right rear of engine block) G104 (gas) (on left rear of engine block) G106 (diesel) (on right front of engine block) G108 G203 (behind left side of dash, near left "a" pillar) Gas I/p relay block Inflatable restraint steering wheel module coil Low ref Mil ctrl Nca Oil lev sw Oil pres sig Person- alization Powertrain control module (pcm) (gas) (on left front of engine compt) S102 S103 S216 S312 Select Steering wheel dic controls Trip Vss W/ dual tank W/o dual tank Wait to start INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 3) for Chevrolet Silverado 2004 1500 List of elements for Courtesy Lamps Wiring Diagram (1 of 3) for Chevrolet Silverado 2004 1500: A11 B12 Body control module (lower left side of dash, below steering column) C3 a6 Cargo lamp low ctrl Class 2 data Class 2 serial data Convenience package comfort and decor level #3 Crew cab only Crew cab w/ ye9 Ctsy lamp ctrl Ctsy lamp on sig Ctsy lamp power Dome lamp switch Door ajar sig Driver door latch assembly Driver door module (ddm) (in left front door) F tan G305 (left "b" pillar) G306 (on right "b" pillar) Headlamp switch Int lamp defeat sig Int lamp defeat sw Left front door courtesy lamp Left rear door courtesy lamp (2003) Left rear door latch assembly Lf door ajar sig Low ref Lr door ajar sig Merchandised package luxury edition Rear dome lamp Rf door ajar sig Right rear door courtesy lamp (2003) Right rear door latch assembly Rr door ajar sig Sp205 (left side of dash) Tan W/ ye9 or w/ y91 W/o ye9 Y91 = Ye9 = Courtesy Lamps Wiring Diagram (2 of 3) for Chevrolet Silverado 2004 1500 List of elements for Courtesy Lamps Wiring Diagram (2 of 3) for Chevrolet Silverado 2004 1500: (in headliner harness between overhead console reading lamps and i/p Cargo lamp Convenience package comfort and decor level 3 Crew cab w/ ye9 Dome Except crew cab w/ ye9 Left vanity mirror lamp Map lamps Merchandised package luxury edition Overhead console Reading Rear courtesy reading lamps (crew cab w/ ye9) Relay block) Right vanity mirror lamp S321 S345 Tan W/ y91 and crew cab w/ ye9 W/ ye9 and crew cab w/o ye9 W/ ye9 except crew cab Y91 = Ye9 = Courtesy Lamps Wiring Diagram (3 of 3) for Chevrolet Silverado 2004 1500 List of elements for Courtesy Lamps Wiring Diagram (3 of 3) for Chevrolet Silverado 2004 1500: (2003) A12 B10 Bin lamp C10 C11 Cargo lamp switch Class 2 data Convenience package comfort and decor level #3 Ctsy lamp control Ctsy lamp power Door ajar sig Front passenger door courtesy light Front passenger door latch assembly Front passenger door module (fpdm) (in right front door) G200 (behind right side of dash, near right "a" pillar) G203 (near left "a" pillar) I/p compartment lamp I/p relay block (below left side of dash, left of steering column) Left i/p courtesy lamp Left i/p fuse block (under left side of dash) Low ref Merchandised package luxury edition Right i/p courtesy lamp (2003) Right i/p fuse block (lower right side of dash) S202 S205 S213 Tan W/ ye9 or w/ y91 W/o ye9 Y91 = Ye9 = Instrument Illumination Wiring Diagram (1 of 3) for Chevrolet Silverado 2004 1500 List of elements for Instrument Illumination Wiring Diagram (1 of 3) for Chevrolet Silverado 2004 1500: 2 hi ind 2 hi ind control 4 hi ind 4 hi ind control 4 lo ind 4 lo ind control 5 volt ref A11 A12 Auto 4wd ind B pnk B11 Body control module (lower left side of dash, below steering column) Crew cab only Diff lock ind control Dimming input Dimming return Drl off Drl off ind ctrl Fog lamp rly ctrl G305 (left "b" pillar) G306 (right "b" pillar) Headlamp on Headlamp on ind ctrl Headlamp switch Instrument panel cluster Instrument panel dimming Left rear window switch Np1 = transfer case, electric shift control, 2 speed np8 = transfer case active, 2 speed pushbutton control Pnk Red Right rear window switch S212 Transfer case shift control module (behind headlamp switch) Transfer case shift control switch W/ np1 W/ np8 Instrument Illumination Wiring Diagram (2 of 3) for Chevrolet Silverado 2004 1500 List of elements for Instrument Illumination Wiring Diagram (2 of 3) for Chevrolet Silverado 2004 1500: (left rear of vehicle, near spare tire bracket) (near left "a" pillar) 2ws ind 2ws ind control 4ws ind 4ws ind control Control Fog lamp circuit G203 Hvac control module Inflatable restraint i/p module disable switch Inflatable restraint steering wheel module coil Lower left Lower right Multifunction accessory switch Nca Overhead console Power take off (pto) switch Rear wheel steering control module Rear wheel steering mode select switch Remote playback device-cd player S205 Steering wheel Tan Tow ind Tow mode ind Traction control switch Transfer case shift control switch Underhood fuse block (left side of engine compt, near battery) Upper left Upper right Instrument Illumination Wiring Diagram (3 of 3) for Chevrolet Silverado 2004 1500 List of elements for Instrument Illumination Wiring Diagram (3 of 3) for Chevrolet Silverado 2004 1500: (lower left side of dash) A11 C10 Driver window/door lock switch Electronic suspension system Exterior lamps Firm indicator Fog lamp Front passenger window/door lock switch G100 (lower left side of radiator core support) G200 (behind right side of dash, near right "a" pillar) G203 (near left "a" pillar) Headlamp leveling switch I/p relay block (below left side of dash, left of steering column) Left i/p fuse block Multifunction accessory switch Right i/p fuse block (lower left side of dash) Roof beacon switch S101 S202 S345 Selectable ride switch W/ t89 W/ t96 MEMORY SYSTEMS Memory Mirrors Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Memory Mirrors Wiring Diagram for Chevrolet Silverado 2004 1500: 5 volt ref Batt (+) Battery Class 2 serial data Computer data lines system Ddm fuse 15a Driver door module (in driver's door) Driver outside rearview mirror Electro- chromic Exit Folding/ telescoping motor Front passenger door module (in passenger's door) Front passenger outside rearview mirror G200 (near right "a" pillar) Ground Heating element Horizontal Hot at all times I/p relay block (below left side of dash, left of steering column) Left Left i/p fuse block (lower left side of dash) Low ref Lt doors circuit breaker 25a Mem 1 sw sig Mem 2 sw sig Memory/ heated seat switch Mir htr low ref Mir htr sply voltage Mir mtr dwn ctrl Mir mtr extend ctrl Mir mtr retract ctrl Mir mtr rt ctrl Mir position sens sig Mir sens low ref Mir signal Mtr position sens sig Pdm fuse 15a Pnk Red Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a Rt/dwn mtr common S202 (in i/p harness) Set Tan Vert posit sens sig Vertical Memory Systems Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Memory Systems Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500: (in driver seat harn) (not used) 5 volt ref Batt (+) C (not used) C10 h Class 2 serial data Computer data lines system Driver seat adjuster switch Frt dwn Frt up Frt vert dn sw sig Frt vert mtr dn ctrl Frt vert mtr pos sen Frt vert mtr up ctrl Frt vert up sw sig Fwd G305 (on left "b" pillar) Gnd Heated seat cus pwr Heated seat temp sig Horiz fwd sw sig Horiz mtr fwd ctrl Horiz mtr pos sen sig Horiz mtr rwd ctrl Horiz rwd sw sig Hot at all times Htd seat back ctrl Htd seat back pwr Htd seat cus ctrl Htd seat cus pwr I/p relay block (near left kick panel) Low ref Lum horiz pos sen sig Lum mtr fwd ctrl Lum mtr rwd ctrl Lum mtr rwd ctrl lum mtr rwd ctrl Memory seat module (under left front seat) Pnk Pnk pnk Rear vert dn sw sig Rear vert mtr pos sens Rear vert up sw sig Rec fwd Rec rwd Recline fwd sw sig Recline mtr fwd ctrl Recline mtr pos sen sig Recline mtr rwd ctrl Recline rwd sw sig Rr dwn Rr up Rr vert mtr dn ctrl Rr vert mtr up ctrl Rwd S311 S314 S315 (in driver seat harn) Seat circuit breaker 30a Seats system (heated seats circuit) Tan Torso blstr in sw sig Torso blstr out sw sig Torso bolster in ctrl Torso bolster out ctrl Trso blstr pos sens sig Memory Systems Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Memory Systems Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500: (in driver seat harn) s309 (in driver seat harn) s310 A red Batt (+) C (not used) Class 2 serial data Computer data lines system Driver door module (in driver's door) Driver seat bolster motor Driver seat bolster motor position sensor Driver seat bolster/ lumbar switch Driver seat front vertical motor Driver seat front vertical position sensor Driver seat horiz- ontal position sensor Driver seat lumbar motor Driver seat lumbar motor position sensor Driver seat rear vertical motor Driver seat rear vertical position sensor Driver seat recliner motor Driver seat recliner motor position sensor Exit Mem 1 sw sig Mem 2 sw sig Memory/ heated seat switch Out Pnk Red Set Tan POWER DISTRIBUTION 4.3L VIN X 4.3L VIN X, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500: (base) (exc base) (in seo harness) (not used) 4ws fuse 15a A c7 A12 Abs fuse 60a Audio amplifier Aux batt fuse 40a Auxiliary battery relay (right rear of engine compt) B c9 B11 c1 B12 c1 B2 c3 Battery (left) Battery (right) Battery (right) (w/aux battery) Body control module C3 b C7 b C9 d Cig ltr fuse 15a Cigar lighter D12 c1 Data link connector Digital radio receiver Dual generator E10 Eap fuse 15a Electronic brake control module Emergency vehicle roof lamp relay Evaporative emissions canister vent solenoid Except luxury F2 c1 From 4wd fuse (diagram 5 of 6) Fuse holder Fusible link G104 (left rear of engine block) G200 (behind right side of dash, near "a" pillar) Generator (left) Generator (right) Harness) I/p relay block (left of steering column) I/p relay block (near left kick panel) Ign a fuse 40a Ign b fuse 40a Luxury Mini fuse 30a Mobile radio Mobile radio fuse 125a Mobile radio fuse block Mobile radio relay Nca Radio Radio amp fuse 30a Radio fuse 15a Rear seat audio (rsa) controller Rear seat audio (rsa) controller (crew cab) Rear wheel steering Rear wheel steering control module Rear wheel steering fuse 125a Red Rr wiper fuse 25a Rtd fuse 30a S102 S205 s303 S220 (in seo red S221 S222 Starter Starter relay Stud 1 fuse 40a Stud 2 fuse 30a Sunroof fuse 25a Tbc batt fuse 10a To ignition switch (diagram 5 of 6) To ignition switch (diagram 6 of 6) To ipc/dic fuse (diagram 2 of 6) Trailer connector Underhood fuse block (left side of engine compt) Underhood junction block Upfitter option Vses/ ecas fuse 60a W/aux battery W/dual batteries Wrecker relay 4.3L VIN X, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) 8s8 A c10 A g A10 Aux pwr fuse 20a Auxiliary power outlet (bin) Auxiliary power outlet (console) Auxiliary power outlet (front) B c5 B11 B11 c1 Blower fuse 40a Blower motor resistor assembly C1 c2 C1 f12 C10 C3 b C4 d C4 e6 C6 a C8 a D12 Defog relay E c8 E11 c1 Except luxury F/pmp relay From radio fuse (diagram 1 of 6) G200 (behind right side of dash, near "a" pillar) Garage door opener Hvac control module Hvac/ecas fuse 10a I/p relay block (left of steering column) I/p relay block (near left kick panel) In i/p harness) s335 Info fuse 15a Instrument panel cluster Ipc/dic fuse 10a Lh hid fuse 20a Luxury Nca Overhead console Pcm b fuse 20a Powertrain control module Rear seat entertainment assembly Red Remote playback device (cd player) Rh hid fuse 20a Right i/p fuse block (lower right side of dash) Roof beacon relay Roof beacon switch Rr defog fuse 30a Rr hvac fuse 30a Seo b1 fuse 15a Seo b2 fuse 30a Stop lp fuse 25a Stoplamp switch To lbec 1 fuse (diagram 3 of 6) Transfer case encoder motor Transfer case shift control module Transmission control module Trec fuse 30a Underhood fuse block (left side of engine compt) Vehicle communication interface module W/o 8s8 4.3L VIN X, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (lower left side of dash) (not used) (passenger seat harness) A c5 A c6 A/c comp fuse 10a A/c comp relay A10 c1 A12 A7 c1 Aux pwr 2 fuse 20a B c7 B10 B12 B7 c2 Body control module C c3 C9 c1 Ddm fuse 15a Driver door module Driver door unlock relay Drl fuse 10a Drl relay E c10 E c7 E10 E11 c1 E12 E3 c3 Ecc fuse 10a Etc/ecm fuse 15a Evaporative emissions (evap) canister purge solenoid Exc base F c3 Flash fuse 25a Fog lp fuse 15a Fog lp relay From mbec 1 fuse (diagram 3 of 6) From pcm b fuse (diagram 2 of 6) From seo ign fuse (diagram 6 of 6) Front passenger door module Fuel composition sensor Fuel pump relay (secondary) G c4 G104 (left rear of engine block) Hdlp-hi relay Hdlp-low relay Horn relay I/p relay block (near left kick panel) Ign 1 relay Intake air temperature (iat)/mass airflow (maf) sensor assembly Lbec 1 fuse 50a Lbec 2 fuse 50a Left i/p fuse block Lock relay Locks fuse 20a Lt doors circuit breaker 25a Lumbar bolster switch (front passenger) M c4 Mbec 1 fuse 50a Memory seat module Park lp relay Pcm 1 fuse 15a Pdm fuse 10a Pnk Powertrain control module Red Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a S102 S328 Sba fuse 15a Seat adjuster switch (driver) Seat adjuster switch (front passenger) Seat circuit breaker 30a Tbc 2a fuse 15a Tbc 2b fuse 15a Tbc 2c fuse 15a Throttle actuator control module (8.1l) To ign 1 relay (diagram 3 of 6) To inj 1 fuse (diagram 4 of 6) Turn signal/ hazard flasher module Underhood fuse block (left side of engine compt) Unlock relay W/s wash fuse 15a W/s wash relay Window switch (left rear) (crew cab) Window switch (right rear) 4.3L VIN X, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500: (4.3l) (4.8l, 5.3, 6.0l) (not used) 4.3l 4.3l, 4.8l, 5.3l, 6.0l 4.8l, 5.3, 6.0l 4.8l, 5.3l, 6.0l, 8.1l 8.1l C10 D10 E10 From pcm 1 fuse (diagram 3 of 6) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 Ignition coil Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module Inj 1 fuse 15a Inj 2 fuse 15a Pnk Pnk a S152 (left engine ignition coil jumper harn) S153 (right engine ignition coil jumper harn) S154 (right engine ignition coil jumper harn) S155 Underhood fuse block (left side of engine compt) 4.3L VIN X, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) (over 8600 gvw) (under 8600 gvw or less) (steering column harness) s240 4wd fuse 15a Acc Air temperature actuator (left) Air temperature actuator (right) Automatic transmission B10 a1 Body control module Brake fuse 10a C1 c9 C1 d12 C1 e8 C175 C2 c2 C4 b C4 c Clutch start switch Crank fuse 10a Cruise Cruise control module Cruise control on/off switch Cruise fuse 10a E11 Electronic brake control module Exc m74 transmission F10 From ign a fuse (diagram 1 of 6) Front axle actuator Htr/ac fuse 30a Hvac 1 fuse 10a Hvac control module Ign 0 fuse 10a Ign 3 fuse 10a Ignition switch Left i/p fuse block (lower left side of dash) Lock Mode actuator Off Pnk Power takeoff (pto) switch Powertrain control module Pto Rear wheel steering control module Recirculation actuator Red Right i/p fuse block (lower right side of dash) Run Start Steering wheel speed/ position sensor Stoplamp switch Tbc ign 0 fuse 10a To auxiliary battery relay (diagram 1 of 6) Tranmission control module Transfer case shift control switch Turn signal multifunction switch Underhood fuse block (left side of engine compt) 4.3L VIN X, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (not used) 8s8 A/c comp relay Acc B/u lp fuse 20a Backup lamp switch Body control module C c8 C1 b2 C10 C8 d8 Clutch start switch (m/t) D c5 D10 c1 Defog relay E c3 Exc 8.l w/o california lev F11 From ign b fuse (diagram 1 of 6) Fuse block mobile radio (upfitter option) Heated oxygen sensor bank 1 sensor 1 Heated oxygen sensor bank 1 sensor 2 Heated oxygen sensor bank 2 sensor 1 Heated oxygen sensor bank 2 sensor 2 I/p relay block (near left kick panel) Ign e fuse 10a Ignition switch Inflatable restraint i/p module disable switch Inflatable restraint passenger presence module Inflatable restraint sensing & diagnostic module Inside rearview mirror Instrument panel cluster Left i/p fuse block (lower left side of dash) Lock M/t Nca O2a fuse 15a O2b fuse 15a Off Park/neutral position switch (a/t) Pnk Rr wpr fuse 15a Run Selectable ride switch Seo accy fuse 10a Seo ign fuse 10a Sir fuse 15a Start Tbc accy fuse 10a Tbc ign 1 fuse 10a To ign 1 relay (diagram 3 of 6) Turn signal/ multifunction switch W/o 8s8 Windshield wiper motor module Ws wpr fuse 25a 4.8L VIN V 4.8L VIN V, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500: (base) (exc base) (in seo harness) (not used) 4ws fuse 15a A c7 A12 Abs fuse 60a Audio amplifier Aux batt fuse 40a Auxiliary battery relay (right rear of engine compt) B c9 B11 c1 B12 c1 B2 c3 Battery (left) Battery (right) Battery (right) (w/aux battery) Body control module C3 b C7 b C9 d Cig ltr fuse 15a Cigar lighter D12 c1 Data link connector Digital radio receiver Dual generator E10 Eap fuse 15a Electronic brake control module Emergency vehicle roof lamp relay Evaporative emissions canister vent solenoid Except luxury F2 c1 From 4wd fuse (diagram 5 of 6) Fuse holder Fusible link G104 (left rear of engine block) G200 (behind right side of dash, near "a" pillar) Generator (left) Generator (right) Harness) I/p relay block (left of steering column) I/p relay block (near left kick panel) Ign a fuse 40a Ign b fuse 40a Luxury Mini fuse 30a Mobile radio Mobile radio fuse 125a Mobile radio fuse block Mobile radio relay Nca Radio Radio amp fuse 30a Radio fuse 15a Rear seat audio (rsa) controller Rear seat audio (rsa) controller (crew cab) Rear wheel steering Rear wheel steering control module Rear wheel steering fuse 125a Red Rr wiper fuse 25a Rtd fuse 30a S102 S205 s303 S220 (in seo red S221 S222 Starter Starter relay Stud 1 fuse 40a Stud 2 fuse 30a Sunroof fuse 25a Tbc batt fuse 10a To ignition switch (diagram 5 of 6) To ignition switch (diagram 6 of 6) To ipc/dic fuse (diagram 2 of 6) Trailer connector Underhood fuse block (left side of engine compt) Underhood junction block Upfitter option Vses/ ecas fuse 60a W/aux battery W/dual batteries Wrecker relay 4.8L VIN V, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) 8s8 A c10 A g A10 Aux pwr fuse 20a Auxiliary power outlet (bin) Auxiliary power outlet (console) Auxiliary power outlet (front) B c5 B11 B11 c1 Blower fuse 40a Blower motor resistor assembly C1 c2 C1 f12 C10 C3 b C4 d C4 e6 C6 a C8 a D12 Defog relay E c8 E11 c1 Except luxury F/pmp relay From radio fuse (diagram 1 of 6) G200 (behind right side of dash, near "a" pillar) Garage door opener Hvac control module Hvac/ecas fuse 10a I/p relay block (left of steering column) I/p relay block (near left kick panel) In i/p harness) s335 Info fuse 15a Instrument panel cluster Ipc/dic fuse 10a Lh hid fuse 20a Luxury Nca Overhead console Pcm b fuse 20a Powertrain control module Rear seat entertainment assembly Red Remote playback device (cd player) Rh hid fuse 20a Right i/p fuse block (lower right side of dash) Roof beacon relay Roof beacon switch Rr defog fuse 30a Rr hvac fuse 30a Seo b1 fuse 15a Seo b2 fuse 30a Stop lp fuse 25a Stoplamp switch To lbec 1 fuse (diagram 3 of 6) Transfer case encoder motor Transfer case shift control module Transmission control module Trec fuse 30a Underhood fuse block (left side of engine compt) Vehicle communication interface module W/o 8s8 4.8L VIN V, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (lower left side of dash) (not used) (passenger seat harness) A c5 A c6 A/c comp fuse 10a A/c comp relay A10 c1 A12 A7 c1 Aux pwr 2 fuse 20a B c7 B10 B12 B7 c2 Body control module C c3 C9 c1 Ddm fuse 15a Driver door module Driver door unlock relay Drl fuse 10a Drl relay E c10 E c7 E10 E11 c1 E12 E3 c3 Ecc fuse 10a Etc/ecm fuse 15a Evaporative emissions (evap) canister purge solenoid Exc base F c3 Flash fuse 25a Fog lp fuse 15a Fog lp relay From mbec 1 fuse (diagram 3 of 6) From pcm b fuse (diagram 2 of 6) From seo ign fuse (diagram 6 of 6) Front passenger door module Fuel composition sensor Fuel pump relay (secondary) G c4 G104 (left rear of engine block) Hdlp-hi relay Hdlp-low relay Horn relay I/p relay block (near left kick panel) Ign 1 relay Intake air temperature (iat)/mass airflow (maf) sensor assembly Lbec 1 fuse 50a Lbec 2 fuse 50a Left i/p fuse block Lock relay Locks fuse 20a Lt doors circuit breaker 25a Lumbar bolster switch (front passenger) M c4 Mbec 1 fuse 50a Memory seat module Park lp relay Pcm 1 fuse 15a Pdm fuse 10a Pnk Powertrain control module Red Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a S102 S328 Sba fuse 15a Seat adjuster switch (driver) Seat adjuster switch (front passenger) Seat circuit breaker 30a Tbc 2a fuse 15a Tbc 2b fuse 15a Tbc 2c fuse 15a Throttle actuator control module (8.1l) To ign 1 relay (diagram 3 of 6) To inj 1 fuse (diagram 4 of 6) Turn signal/ hazard flasher module Underhood fuse block (left side of engine compt) Unlock relay W/s wash fuse 15a W/s wash relay Window switch (left rear) (crew cab) Window switch (right rear) 4.8L VIN V, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500: (4.3l) (4.8l, 5.3, 6.0l) (not used) 4.3l 4.3l, 4.8l, 5.3l, 6.0l 4.8l, 5.3, 6.0l 4.8l, 5.3l, 6.0l, 8.1l 8.1l C10 D10 E10 From pcm 1 fuse (diagram 3 of 6) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 Ignition coil Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module Inj 1 fuse 15a Inj 2 fuse 15a Pnk Pnk a S152 (left engine ignition coil jumper harn) S153 (right engine ignition coil jumper harn) S154 (right engine ignition coil jumper harn) S155 Underhood fuse block (left side of engine compt) 4.8L VIN V, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) (over 8600 gvw) (under 8600 gvw or less) (steering column harness) s240 4wd fuse 15a Acc Air temperature actuator (left) Air temperature actuator (right) Automatic transmission B10 a1 Body control module Brake fuse 10a C1 c9 C1 d12 C1 e8 C175 C2 c2 C4 b C4 c Clutch start switch Crank fuse 10a Cruise Cruise control module Cruise control on/off switch Cruise fuse 10a E11 Electronic brake control module Exc m74 transmission F10 From ign a fuse (diagram 1 of 6) Front axle actuator Htr/ac fuse 30a Hvac 1 fuse 10a Hvac control module Ign 0 fuse 10a Ign 3 fuse 10a Ignition switch Left i/p fuse block (lower left side of dash) Lock Mode actuator Off Pnk Power takeoff (pto) switch Powertrain control module Pto Rear wheel steering control module Recirculation actuator Red Right i/p fuse block (lower right side of dash) Run Start Steering wheel speed/ position sensor Stoplamp switch Tbc ign 0 fuse 10a To auxiliary battery relay (diagram 1 of 6) Tranmission control module Transfer case shift control switch Turn signal multifunction switch Underhood fuse block (left side of engine compt) 4.8L VIN V, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (not used) 8s8 A/c comp relay Acc B/u lp fuse 20a Backup lamp switch Body control module C c8 C1 b2 C10 C8 d8 Clutch start switch (m/t) D c5 D10 c1 Defog relay E c3 Exc 8.l w/o california lev F11 From ign b fuse (diagram 1 of 6) Fuse block mobile radio (upfitter option) Heated oxygen sensor bank 1 sensor 1 Heated oxygen sensor bank 1 sensor 2 Heated oxygen sensor bank 2 sensor 1 Heated oxygen sensor bank 2 sensor 2 I/p relay block (near left kick panel) Ign e fuse 10a Ignition switch Inflatable restraint i/p module disable switch Inflatable restraint passenger presence module Inflatable restraint sensing & diagnostic module Inside rearview mirror Instrument panel cluster Left i/p fuse block (lower left side of dash) Lock M/t Nca O2a fuse 15a O2b fuse 15a Off Park/neutral position switch (a/t) Pnk Rr wpr fuse 15a Run Selectable ride switch Seo accy fuse 10a Seo ign fuse 10a Sir fuse 15a Start Tbc accy fuse 10a Tbc ign 1 fuse 10a To ign 1 relay (diagram 3 of 6) Turn signal/ multifunction switch W/o 8s8 Windshield wiper motor module Ws wpr fuse 25a 5.3L VIN T 5.3L VIN T, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500: (base) (exc base) (in seo harness) (not used) 4ws fuse 15a A c7 A12 Abs fuse 60a Audio amplifier Aux batt fuse 40a Auxiliary battery relay (right rear of engine compt) B c9 B11 c1 B12 c1 B2 c3 Battery (left) Battery (right) Battery (right) (w/aux battery) Body control module C3 b C7 b C9 d Cig ltr fuse 15a Cigar lighter D12 c1 Data link connector Digital radio receiver Dual generator E10 Eap fuse 15a Electronic brake control module Emergency vehicle roof lamp relay Evaporative emissions canister vent solenoid Except luxury F2 c1 From 4wd fuse (diagram 5 of 6) Fuse holder Fusible link G104 (left rear of engine block) G200 (behind right side of dash, near "a" pillar) Generator (left) Generator (right) Harness) I/p relay block (left of steering column) I/p relay block (near left kick panel) Ign a fuse 40a Ign b fuse 40a Luxury Mini fuse 30a Mobile radio Mobile radio fuse 125a Mobile radio fuse block Mobile radio relay Nca Radio Radio amp fuse 30a Radio fuse 15a Rear seat audio (rsa) controller Rear seat audio (rsa) controller (crew cab) Rear wheel steering Rear wheel steering control module Rear wheel steering fuse 125a Red Rr wiper fuse 25a Rtd fuse 30a S102 S205 s303 S220 (in seo red S221 S222 Starter Starter relay Stud 1 fuse 40a Stud 2 fuse 30a Sunroof fuse 25a Tbc batt fuse 10a To ignition switch (diagram 5 of 6) To ignition switch (diagram 6 of 6) To ipc/dic fuse (diagram 2 of 6) Trailer connector Underhood fuse block (left side of engine compt) Underhood junction block Upfitter option Vses/ ecas fuse 60a W/aux battery W/dual batteries Wrecker relay 5.3L VIN T, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) 8s8 A c10 A g A10 Aux pwr fuse 20a Auxiliary power outlet (bin) Auxiliary power outlet (console) Auxiliary power outlet (front) B c5 B11 B11 c1 Blower fuse 40a Blower motor resistor assembly C1 c2 C1 f12 C10 C3 b C4 d C4 e6 C6 a C8 a D12 Defog relay E c8 E11 c1 Except luxury F/pmp relay From radio fuse (diagram 1 of 6) G200 (behind right side of dash, near "a" pillar) Garage door opener Hvac control module Hvac/ecas fuse 10a I/p relay block (left of steering column) I/p relay block (near left kick panel) In i/p harness) s335 Info fuse 15a Instrument panel cluster Ipc/dic fuse 10a Lh hid fuse 20a Luxury Nca Overhead console Pcm b fuse 20a Powertrain control module Rear seat entertainment assembly Red Remote playback device (cd player) Rh hid fuse 20a Right i/p fuse block (lower right side of dash) Roof beacon relay Roof beacon switch Rr defog fuse 30a Rr hvac fuse 30a Seo b1 fuse 15a Seo b2 fuse 30a Stop lp fuse 25a Stoplamp switch To lbec 1 fuse (diagram 3 of 6) Transfer case encoder motor Transfer case shift control module Transmission control module Trec fuse 30a Underhood fuse block (left side of engine compt) Vehicle communication interface module W/o 8s8 5.3L VIN T, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (lower left side of dash) (not used) (passenger seat harness) A c5 A c6 A/c comp fuse 10a A/c comp relay A10 c1 A12 A7 c1 Aux pwr 2 fuse 20a B c7 B10 B12 B7 c2 Body control module C c3 C9 c1 Ddm fuse 15a Driver door module Driver door unlock relay Drl fuse 10a Drl relay E c10 E c7 E10 E11 c1 E12 E3 c3 Ecc fuse 10a Etc/ecm fuse 15a Evaporative emissions (evap) canister purge solenoid Exc base F c3 Flash fuse 25a Fog lp fuse 15a Fog lp relay From mbec 1 fuse (diagram 3 of 6) From pcm b fuse (diagram 2 of 6) From seo ign fuse (diagram 6 of 6) Front passenger door module Fuel composition sensor Fuel pump relay (secondary) G c4 G104 (left rear of engine block) Hdlp-hi relay Hdlp-low relay Horn relay I/p relay block (near left kick panel) Ign 1 relay Intake air temperature (iat)/mass airflow (maf) sensor assembly Lbec 1 fuse 50a Lbec 2 fuse 50a Left i/p fuse block Lock relay Locks fuse 20a Lt doors circuit breaker 25a Lumbar bolster switch (front passenger) M c4 Mbec 1 fuse 50a Memory seat module Park lp relay Pcm 1 fuse 15a Pdm fuse 10a Pnk Powertrain control module Red Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a S102 S328 Sba fuse 15a Seat adjuster switch (driver) Seat adjuster switch (front passenger) Seat circuit breaker 30a Tbc 2a fuse 15a Tbc 2b fuse 15a Tbc 2c fuse 15a Throttle actuator control module (8.1l) To ign 1 relay (diagram 3 of 6) To inj 1 fuse (diagram 4 of 6) Turn signal/ hazard flasher module Underhood fuse block (left side of engine compt) Unlock relay W/s wash fuse 15a W/s wash relay Window switch (left rear) (crew cab) Window switch (right rear) 5.3L VIN T, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500: (4.3l) (4.8l, 5.3, 6.0l) (not used) 4.3l 4.3l, 4.8l, 5.3l, 6.0l 4.8l, 5.3, 6.0l 4.8l, 5.3l, 6.0l, 8.1l 8.1l C10 D10 E10 From pcm 1 fuse (diagram 3 of 6) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 Ignition coil Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module Inj 1 fuse 15a Inj 2 fuse 15a Pnk Pnk a S152 (left engine ignition coil jumper harn) S153 (right engine ignition coil jumper harn) S154 (right engine ignition coil jumper harn) S155 Underhood fuse block (left side of engine compt) 5.3L VIN T, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) (over 8600 gvw) (under 8600 gvw or less) (steering column harness) s240 4wd fuse 15a Acc Air temperature actuator (left) Air temperature actuator (right) Automatic transmission B10 a1 Body control module Brake fuse 10a C1 c9 C1 d12 C1 e8 C175 C2 c2 C4 b C4 c Clutch start switch Crank fuse 10a Cruise Cruise control module Cruise control on/off switch Cruise fuse 10a E11 Electronic brake control module Exc m74 transmission F10 From ign a fuse (diagram 1 of 6) Front axle actuator Htr/ac fuse 30a Hvac 1 fuse 10a Hvac control module Ign 0 fuse 10a Ign 3 fuse 10a Ignition switch Left i/p fuse block (lower left side of dash) Lock Mode actuator Off Pnk Power takeoff (pto) switch Powertrain control module Pto Rear wheel steering control module Recirculation actuator Red Right i/p fuse block (lower right side of dash) Run Start Steering wheel speed/ position sensor Stoplamp switch Tbc ign 0 fuse 10a To auxiliary battery relay (diagram 1 of 6) Tranmission control module Transfer case shift control switch Turn signal multifunction switch Underhood fuse block (left side of engine compt) 5.3L VIN T, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (not used) 8s8 A/c comp relay Acc B/u lp fuse 20a Backup lamp switch Body control module C c8 C1 b2 C10 C8 d8 Clutch start switch (m/t) D c5 D10 c1 Defog relay E c3 Exc 8.l w/o california lev F11 From ign b fuse (diagram 1 of 6) Fuse block mobile radio (upfitter option) Heated oxygen sensor bank 1 sensor 1 Heated oxygen sensor bank 1 sensor 2 Heated oxygen sensor bank 2 sensor 1 Heated oxygen sensor bank 2 sensor 2 I/p relay block (near left kick panel) Ign e fuse 10a Ignition switch Inflatable restraint i/p module disable switch Inflatable restraint passenger presence module Inflatable restraint sensing & diagnostic module Inside rearview mirror Instrument panel cluster Left i/p fuse block (lower left side of dash) Lock M/t Nca O2a fuse 15a O2b fuse 15a Off Park/neutral position switch (a/t) Pnk Rr wpr fuse 15a Run Selectable ride switch Seo accy fuse 10a Seo ign fuse 10a Sir fuse 15a Start Tbc accy fuse 10a Tbc ign 1 fuse 10a To ign 1 relay (diagram 3 of 6) Turn signal/ multifunction switch W/o 8s8 Windshield wiper motor module Ws wpr fuse 25a 5.3L VIN Z 5.3L VIN Z, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500: (base) (exc base) (in seo harness) (not used) 4ws fuse 15a A c7 A12 Abs fuse 60a Audio amplifier Aux batt fuse 40a Auxiliary battery relay (right rear of engine compt) B c9 B11 c1 B12 c1 B2 c3 Battery (left) Battery (right) Battery (right) (w/aux battery) Body control module C3 b C7 b C9 d Cig ltr fuse 15a Cigar lighter D12 c1 Data link connector Digital radio receiver Dual generator E10 Eap fuse 15a Electronic brake control module Emergency vehicle roof lamp relay Evaporative emissions canister vent solenoid Except luxury F2 c1 From 4wd fuse (diagram 5 of 6) Fuse holder Fusible link G104 (left rear of engine block) G200 (behind right side of dash, near "a" pillar) Generator (left) Generator (right) Harness) I/p relay block (left of steering column) I/p relay block (near left kick panel) Ign a fuse 40a Ign b fuse 40a Luxury Mini fuse 30a Mobile radio Mobile radio fuse 125a Mobile radio fuse block Mobile radio relay Nca Radio Radio amp fuse 30a Radio fuse 15a Rear seat audio (rsa) controller Rear seat audio (rsa) controller (crew cab) Rear wheel steering Rear wheel steering control module Rear wheel steering fuse 125a Red Rr wiper fuse 25a Rtd fuse 30a S102 S205 s303 S220 (in seo red S221 S222 Starter Starter relay Stud 1 fuse 40a Stud 2 fuse 30a Sunroof fuse 25a Tbc batt fuse 10a To ignition switch (diagram 5 of 6) To ignition switch (diagram 6 of 6) To ipc/dic fuse (diagram 2 of 6) Trailer connector Underhood fuse block (left side of engine compt) Underhood junction block Upfitter option Vses/ ecas fuse 60a W/aux battery W/dual batteries Wrecker relay 5.3L VIN Z, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) 8s8 A c10 A g A10 Aux pwr fuse 20a Auxiliary power outlet (bin) Auxiliary power outlet (console) Auxiliary power outlet (front) B c5 B11 B11 c1 Blower fuse 40a Blower motor resistor assembly C1 c2 C1 f12 C10 C3 b C4 d C4 e6 C6 a C8 a D12 Defog relay E c8 E11 c1 Except luxury F/pmp relay From radio fuse (diagram 1 of 6) G200 (behind right side of dash, near "a" pillar) Garage door opener Hvac control module Hvac/ecas fuse 10a I/p relay block (left of steering column) I/p relay block (near left kick panel) In i/p harness) s335 Info fuse 15a Instrument panel cluster Ipc/dic fuse 10a Lh hid fuse 20a Luxury Nca Overhead console Pcm b fuse 20a Powertrain control module Rear seat entertainment assembly Red Remote playback device (cd player) Rh hid fuse 20a Right i/p fuse block (lower right side of dash) Roof beacon relay Roof beacon switch Rr defog fuse 30a Rr hvac fuse 30a Seo b1 fuse 15a Seo b2 fuse 30a Stop lp fuse 25a Stoplamp switch To lbec 1 fuse (diagram 3 of 6) Transfer case encoder motor Transfer case shift control module Transmission control module Trec fuse 30a Underhood fuse block (left side of engine compt) Vehicle communication interface module W/o 8s8 5.3L VIN Z, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (lower left side of dash) (not used) (passenger seat harness) A c5 A c6 A/c comp fuse 10a A/c comp relay A10 c1 A12 A7 c1 Aux pwr 2 fuse 20a B c7 B10 B12 B7 c2 Body control module C c3 C9 c1 Ddm fuse 15a Driver door module Driver door unlock relay Drl fuse 10a Drl relay E c10 E c7 E10 E11 c1 E12 E3 c3 Ecc fuse 10a Etc/ecm fuse 15a Evaporative emissions (evap) canister purge solenoid Exc base F c3 Flash fuse 25a Fog lp fuse 15a Fog lp relay From mbec 1 fuse (diagram 3 of 6) From pcm b fuse (diagram 2 of 6) From seo ign fuse (diagram 6 of 6) Front passenger door module Fuel composition sensor Fuel pump relay (secondary) G c4 G104 (left rear of engine block) Hdlp-hi relay Hdlp-low relay Horn relay I/p relay block (near left kick panel) Ign 1 relay Intake air temperature (iat)/mass airflow (maf) sensor assembly Lbec 1 fuse 50a Lbec 2 fuse 50a Left i/p fuse block Lock relay Locks fuse 20a Lt doors circuit breaker 25a Lumbar bolster switch (front passenger) M c4 Mbec 1 fuse 50a Memory seat module Park lp relay Pcm 1 fuse 15a Pdm fuse 10a Pnk Powertrain control module Red Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a S102 S328 Sba fuse 15a Seat adjuster switch (driver) Seat adjuster switch (front passenger) Seat circuit breaker 30a Tbc 2a fuse 15a Tbc 2b fuse 15a Tbc 2c fuse 15a Throttle actuator control module (8.1l) To ign 1 relay (diagram 3 of 6) To inj 1 fuse (diagram 4 of 6) Turn signal/ hazard flasher module Underhood fuse block (left side of engine compt) Unlock relay W/s wash fuse 15a W/s wash relay Window switch (left rear) (crew cab) Window switch (right rear) 5.3L VIN Z, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500: (4.3l) (4.8l, 5.3, 6.0l) (not used) 4.3l 4.3l, 4.8l, 5.3l, 6.0l 4.8l, 5.3, 6.0l 4.8l, 5.3l, 6.0l, 8.1l 8.1l C10 D10 E10 From pcm 1 fuse (diagram 3 of 6) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 Ignition coil Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module Inj 1 fuse 15a Inj 2 fuse 15a Pnk Pnk a S152 (left engine ignition coil jumper harn) S153 (right engine ignition coil jumper harn) S154 (right engine ignition coil jumper harn) S155 Underhood fuse block (left side of engine compt) 5.3L VIN Z, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) (over 8600 gvw) (under 8600 gvw or less) (steering column harness) s240 4wd fuse 15a Acc Air temperature actuator (left) Air temperature actuator (right) Automatic transmission B10 a1 Body control module Brake fuse 10a C1 c9 C1 d12 C1 e8 C175 C2 c2 C4 b C4 c Clutch start switch Crank fuse 10a Cruise Cruise control module Cruise control on/off switch Cruise fuse 10a E11 Electronic brake control module Exc m74 transmission F10 From ign a fuse (diagram 1 of 6) Front axle actuator Htr/ac fuse 30a Hvac 1 fuse 10a Hvac control module Ign 0 fuse 10a Ign 3 fuse 10a Ignition switch Left i/p fuse block (lower left side of dash) Lock Mode actuator Off Pnk Power takeoff (pto) switch Powertrain control module Pto Rear wheel steering control module Recirculation actuator Red Right i/p fuse block (lower right side of dash) Run Start Steering wheel speed/ position sensor Stoplamp switch Tbc ign 0 fuse 10a To auxiliary battery relay (diagram 1 of 6) Tranmission control module Transfer case shift control switch Turn signal multifunction switch Underhood fuse block (left side of engine compt) 5.3L VIN Z, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (not used) 8s8 A/c comp relay Acc B/u lp fuse 20a Backup lamp switch Body control module C c8 C1 b2 C10 C8 d8 Clutch start switch (m/t) D c5 D10 c1 Defog relay E c3 Exc 8.l w/o california lev F11 From ign b fuse (diagram 1 of 6) Fuse block mobile radio (upfitter option) Heated oxygen sensor bank 1 sensor 1 Heated oxygen sensor bank 1 sensor 2 Heated oxygen sensor bank 2 sensor 1 Heated oxygen sensor bank 2 sensor 2 I/p relay block (near left kick panel) Ign e fuse 10a Ignition switch Inflatable restraint i/p module disable switch Inflatable restraint passenger presence module Inflatable restraint sensing & diagnostic module Inside rearview mirror Instrument panel cluster Left i/p fuse block (lower left side of dash) Lock M/t Nca O2a fuse 15a O2b fuse 15a Off Park/neutral position switch (a/t) Pnk Rr wpr fuse 15a Run Selectable ride switch Seo accy fuse 10a Seo ign fuse 10a Sir fuse 15a Start Tbc accy fuse 10a Tbc ign 1 fuse 10a To ign 1 relay (diagram 3 of 6) Turn signal/ multifunction switch W/o 8s8 Windshield wiper motor module Ws wpr fuse 25a 6.0L VIN N 6.0L VIN N, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Power Distribution Wiring Diagram (1 of 6) for Chevrolet Silverado 2004 1500: (base) (exc base) (in seo harness) (not used) 4ws fuse 15a A c7 A12 Abs fuse 60a Audio amplifier Aux batt fuse 40a Auxiliary battery relay (right rear of engine compt) B c9 B11 c1 B12 c1 B2 c3 Battery (left) Battery (right) Battery (right) (w/aux battery) Body control module C3 b C7 b C9 d Cig ltr fuse 15a Cigar lighter D12 c1 Data link connector Digital radio receiver Dual generator E10 Eap fuse 15a Electronic brake control module Emergency vehicle roof lamp relay Evaporative emissions canister vent solenoid Except luxury F2 c1 From 4wd fuse (diagram 5 of 6) Fuse holder Fusible link G104 (left rear of engine block) G200 (behind right side of dash, near "a" pillar) Generator (left) Generator (right) Harness) I/p relay block (left of steering column) I/p relay block (near left kick panel) Ign a fuse 40a Ign b fuse 40a Luxury Mini fuse 30a Mobile radio Mobile radio fuse 125a Mobile radio fuse block Mobile radio relay Nca Radio Radio amp fuse 30a Radio fuse 15a Rear seat audio (rsa) controller Rear seat audio (rsa) controller (crew cab) Rear wheel steering Rear wheel steering control module Rear wheel steering fuse 125a Red Rr wiper fuse 25a Rtd fuse 30a S102 S205 s303 S220 (in seo red S221 S222 Starter Starter relay Stud 1 fuse 40a Stud 2 fuse 30a Sunroof fuse 25a Tbc batt fuse 10a To ignition switch (diagram 5 of 6) To ignition switch (diagram 6 of 6) To ipc/dic fuse (diagram 2 of 6) Trailer connector Underhood fuse block (left side of engine compt) Underhood junction block Upfitter option Vses/ ecas fuse 60a W/aux battery W/dual batteries Wrecker relay 6.0L VIN N, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Power Distribution Wiring Diagram (2 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) 8s8 A c10 A g A10 Aux pwr fuse 20a Auxiliary power outlet (bin) Auxiliary power outlet (console) Auxiliary power outlet (front) B c5 B11 B11 c1 Blower fuse 40a Blower motor resistor assembly C1 c2 C1 f12 C10 C3 b C4 d C4 e6 C6 a C8 a D12 Defog relay E c8 E11 c1 Except luxury F/pmp relay From radio fuse (diagram 1 of 6) G200 (behind right side of dash, near "a" pillar) Garage door opener Hvac control module Hvac/ecas fuse 10a I/p relay block (left of steering column) I/p relay block (near left kick panel) In i/p harness) s335 Info fuse 15a Instrument panel cluster Ipc/dic fuse 10a Lh hid fuse 20a Luxury Nca Overhead console Pcm b fuse 20a Powertrain control module Rear seat entertainment assembly Red Remote playback device (cd player) Rh hid fuse 20a Right i/p fuse block (lower right side of dash) Roof beacon relay Roof beacon switch Rr defog fuse 30a Rr hvac fuse 30a Seo b1 fuse 15a Seo b2 fuse 30a Stop lp fuse 25a Stoplamp switch To lbec 1 fuse (diagram 3 of 6) Transfer case encoder motor Transfer case shift control module Transmission control module Trec fuse 30a Underhood fuse block (left side of engine compt) Vehicle communication interface module W/o 8s8 6.0L VIN N, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Power Distribution Wiring Diagram (3 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (lower left side of dash) (not used) (passenger seat harness) A c5 A c6 A/c comp fuse 10a A/c comp relay A10 c1 A12 A7 c1 Aux pwr 2 fuse 20a B c7 B10 B12 B7 c2 Body control module C c3 C9 c1 Ddm fuse 15a Driver door module Driver door unlock relay Drl fuse 10a Drl relay E c10 E c7 E10 E11 c1 E12 E3 c3 Ecc fuse 10a Etc/ecm fuse 15a Evaporative emissions (evap) canister purge solenoid Exc base F c3 Flash fuse 25a Fog lp fuse 15a Fog lp relay From mbec 1 fuse (diagram 3 of 6) From pcm b fuse (diagram 2 of 6) From seo ign fuse (diagram 6 of 6) Front passenger door module Fuel composition sensor Fuel pump relay (secondary) G c4 G104 (left rear of engine block) Hdlp-hi relay Hdlp-low relay Horn relay I/p relay block (near left kick panel) Ign 1 relay Intake air temperature (iat)/mass airflow (maf) sensor assembly Lbec 1 fuse 50a Lbec 2 fuse 50a Left i/p fuse block Lock relay Locks fuse 20a Lt doors circuit breaker 25a Lumbar bolster switch (front passenger) M c4 Mbec 1 fuse 50a Memory seat module Park lp relay Pcm 1 fuse 15a Pdm fuse 10a Pnk Powertrain control module Red Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a S102 S328 Sba fuse 15a Seat adjuster switch (driver) Seat adjuster switch (front passenger) Seat circuit breaker 30a Tbc 2a fuse 15a Tbc 2b fuse 15a Tbc 2c fuse 15a Throttle actuator control module (8.1l) To ign 1 relay (diagram 3 of 6) To inj 1 fuse (diagram 4 of 6) Turn signal/ hazard flasher module Underhood fuse block (left side of engine compt) Unlock relay W/s wash fuse 15a W/s wash relay Window switch (left rear) (crew cab) Window switch (right rear) 6.0L VIN N, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Power Distribution Wiring Diagram (4 of 6) for Chevrolet Silverado 2004 1500: (4.3l) (4.8l, 5.3, 6.0l) (not used) 4.3l 4.3l, 4.8l, 5.3l, 6.0l 4.8l, 5.3, 6.0l 4.8l, 5.3l, 6.0l, 8.1l 8.1l C10 D10 E10 From pcm 1 fuse (diagram 3 of 6) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 Ignition coil Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition control module Inj 1 fuse 15a Inj 2 fuse 15a Pnk Pnk a S152 (left engine ignition coil jumper harn) S153 (right engine ignition coil jumper harn) S154 (right engine ignition coil jumper harn) S155 Underhood fuse block (left side of engine compt) 6.0L VIN N, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Power Distribution Wiring Diagram (5 of 6) for Chevrolet Silverado 2004 1500: (auto a/c) (man a/c) (not used) (over 8600 gvw) (under 8600 gvw or less) (steering column harness) s240 4wd fuse 15a Acc Air temperature actuator (left) Air temperature actuator (right) Automatic transmission B10 a1 Body control module Brake fuse 10a C1 c9 C1 d12 C1 e8 C175 C2 c2 C4 b C4 c Clutch start switch Crank fuse 10a Cruise Cruise control module Cruise control on/off switch Cruise fuse 10a E11 Electronic brake control module Exc m74 transmission F10 From ign a fuse (diagram 1 of 6) Front axle actuator Htr/ac fuse 30a Hvac 1 fuse 10a Hvac control module Ign 0 fuse 10a Ign 3 fuse 10a Ignition switch Left i/p fuse block (lower left side of dash) Lock Mode actuator Off Pnk Power takeoff (pto) switch Powertrain control module Pto Rear wheel steering control module Recirculation actuator Red Right i/p fuse block (lower right side of dash) Run Start Steering wheel speed/ position sensor Stoplamp switch Tbc ign 0 fuse 10a To auxiliary battery relay (diagram 1 of 6) Tranmission control module Transfer case shift control switch Turn signal multifunction switch Underhood fuse block (left side of engine compt) 6.0L VIN N, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Power Distribution Wiring Diagram (6 of 6) for Chevrolet Silverado 2004 1500: (left side of engine compt) underhood fuse block (not used) 8s8 A/c comp relay Acc B/u lp fuse 20a Backup lamp switch Body control module C c8 C1 b2 C10 C8 d8 Clutch start switch (m/t) D c5 D10 c1 Defog relay E c3 Exc 8.l w/o california lev F11 From ign b fuse (diagram 1 of 6) Fuse block mobile radio (upfitter option) Heated oxygen sensor bank 1 sensor 1 Heated oxygen sensor bank 1 sensor 2 Heated oxygen sensor bank 2 sensor 1 Heated oxygen sensor bank 2 sensor 2 I/p relay block (near left kick panel) Ign e fuse 10a Ignition switch Inflatable restraint i/p module disable switch Inflatable restraint passenger presence module Inflatable restraint sensing & diagnostic module Inside rearview mirror Instrument panel cluster Left i/p fuse block (lower left side of dash) Lock M/t Nca O2a fuse 15a O2b fuse 15a Off Park/neutral position switch (a/t) Pnk Rr wpr fuse 15a Run Selectable ride switch Seo accy fuse 10a Seo ign fuse 10a Sir fuse 15a Start Tbc accy fuse 10a Tbc ign 1 fuse 10a To ign 1 relay (diagram 3 of 6) Turn signal/ multifunction switch W/o 8s8 Windshield wiper motor module Ws wpr fuse 25a POWER DOOR LOCKS Power Door Locks Wiring Diagram, Base for Chevrolet Silverado 2004 1500 List of elements for Power Door Locks Wiring Diagram, Base for Chevrolet Silverado 2004 1500: (gasoline) (diesel) A12 B10 B11 B12 Battery Body control module (on lower left side of dash, near steering column) C1 2c C1 c9 C1 d10 C1 d11 C1 d12 C1 f6 C3 b C3 f C7 f Driver door lock actuator Driver door lock switch Driver unlock relay Front passenger door lock actuator Front passenger door lock switch G200 (below right side of dash) G203 (near left "a" pillar) Hot at all times I/p relay block (near left kick panel) Ign key sw Ignition key alarm switch (on ignition key cylinder) Instrument panel cluster Left i/p fuse block (lower left side of dash) Left rear door lock actuator Lock Lock ctrl Lock relay Locks fuse 20a Pcm ecm (left front of engine compartment) Relay ctrl Right i/p fuse block (lower right side of dash) Right rear door lock actuator S202 (in i/p harn) S217 Serial data Splice pack sp205 (in i/p harn) Tan Tbc batt fuse 10a Underhood fuse block (on left side of engine compt) Unlock Unlock ctrl Unlock relay W/ crew cab Power Door Locks Wiring Diagram, Up Level (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Power Door Locks Wiring Diagram, Up Level (1 of 2) for Chevrolet Silverado 2004 1500: (gasoline) (diesel) (lower left side of dash) left i/p fuse block A12 B12 Battery Body control module (on lower left side of dash, near steering column) C1 a2 C1 a7 C1 f6 C4 l (not used) Door lock switch Driver door module (inside driver door) F (not used) Front passenger door module (inside right front passenger door) G200 (behind right side of dash) G200 (below right side of dash) G203 (near left kick panel) Ground Hot at all times I/p relay block (behind left side of dash) Ign key sw Ignition key alarm switch (on ignition key cylinder) Key sw Key sw sig Left i/p fuse block (lower left side of dash) Left rear door lock actuator Lock Lock ctrl Lock relay Locks fuse 20a Pcm ecm (left front of engine compartment) Pdm fuse 10a Right i/p fuse block (behind right side of dash) Right i/p fuse block (lower right side of dash) Right rear door lock actuator S202 (in i/p harn) S217 Serial data Tan Unlock Unlock ctrl Unlock relay Power Door Locks Wiring Diagram, Up Level (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Power Door Locks Wiring Diagram, Up Level (2 of 2) for Chevrolet Silverado 2004 1500: (lower right side of dash) right i/p fuse block C1 d12 Driver mini wedge door jamb switch (rear of driver's door) Front passenger mini wedge door jamb switch (rear of left front passenger's door) Hot at all times Instrument panel cluster Key sw Lock act Splice pack sp205 (in i/p harn) Tan Tbc batt fuse 10a Underhood fuse block (on left side of engine compt) POWER MIRRORS Electrochromic Mirror Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Electrochromic Mirror Wiring Diagram for Chevrolet Silverado 2004 1500: A12 A7 c1 Air temp sensor Ambient photo sensor B11 B12 Back up lamp voltage output c5 Back up voltage Body control module (bcm) (on lower left side of dash, below steering column) Body relay block Compass Computer data lines system Driver door module (ddm) (in driver's door) Driver outside rearview mirror Electrochromic mirror G200 (near right "a" pillar) Ground Hot in run & start Ign 1 Inside rearview mirror Left i/p fuse block (lower left side of dash) Low ref Mir signal Nca On/off Outside air temperature sensor Pnk Rr light photo sensor S345 Selector switch Serial data Sir fuse 15a Temp Underhood fuse block (left side of engine compt) Power Mirrors Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Power Mirrors Wiring Diagram for Chevrolet Silverado 2004 1500: 5 volt ref B11 Battery Class 2 serial data Computer data lines system Ddm fuse 15a Down Driver door module (in driver's door) Driver mirror Driver outside rearview mirror Electro- chromic Folding/ telescoping motor Front passenger door module (in right front door) Front passenger outside rearview mirror G200 (near right "a" pillar) Ground Heating element Horizontal Hot at all times Hvac control module (in center of dash) I/p relay block (near left kick panel) Left Left i/p fuse block (lower left side of dash) Low ref Lt doors circuit breaker 25a Mir htr low ref Mir htr sply voltage Mir mtr dwn ctrl Mir mtr extend ctrl Mir mtr retract ctrl Mir mtr rt ctrl Mir position sens sig Mir sens low ref Mir signal Mtr position sens sig Pass- enger mirror Pdm fuse 10a Pnk Red Right Right i/p fuse block (lower right side of dash) Rt door circuit breaker 25a Rt/dwn mtr common S202 Switch power Tan Vert posit sens sig Vertical POWER SEATS Driver Seat Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Driver Seat Wiring Diagram for Chevrolet Silverado 2004 1500: Back C10 Crew cab Driver seat adjuster switch Driver seat front vertical motor Driver seat horizontal motor Driver seat rear vertical motor Except crew cab Front dn Front up Fwd G305 (on left "b" pillar) G306 (on right "b" pillar) Hot at all times I/p relay block Rear dn Rear up Red Seats circuit breaker 30a Tan Heated Seats Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Heated Seats Wiring Diagram for Chevrolet Silverado 2004 1500: (in driver seat jumper harness) (in driver's seat harness) s311 (not used) Back & cushion select Back only ind Back only indicator Back only select Batt Batt (+) Bck & csh select C1 4a C1 7e C1 a7 C1 c9 C1 f6 C10 h C2 f C3 c C3 d C3 f C4 a C7 c C7 e Computer data lines system Ddm fuse 15a Driver back heated seat element Driver cushion heated seat element Driver door module Element control Front passenger back heated seat element Front passenger cushion heated seat element Front passenger door module G200 (behind right side of dash, near right "a" pillar) G305 (on left "b" pillar) Gnd Ground Hi heat ind Hi heat indicator Hot at all times I/p relay block Left i/p fuse block Low heat ind Low heat indicator Low ref Lt doors circuit breaker 25a Med heat ind Med heat indicator Memory seat module (underside of left front seat) Memory/heated seat switch Nca Pdm fuse 10a Pnk Right i/p fuse block Rt doors circuit breaker 30a S202 S314 Seats circuit breaker 30a Serial data Switch power Tan Temp signal Passenger Full Feature Seat Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Passenger Full Feature Seat Wiring Diagram for Chevrolet Silverado 2004 1500: Back C10 Fr dn Fr up Front passenger seat adjuster switch Front passenger seat front vertical motor Front passenger seat horizontal motor Front passenger seat rear recliner motor Front passenger seat rear vertical motor Fwd G306 (on right "b" pillar) Hot at all times I/p relay block Red Rr dn Rr up S328 S329 Seats circuit breaker 30a Tan Passenger"s Lumbar Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Passenger"s Lumbar Wiring Diagram for Chevrolet Silverado 2004 1500: C10 e Front passenger lumbar/ bolster switch Front passenger seat bolster m0tor Front passenger seat lumbar m0tor G306 (on right "b" pillar) Hot at all times I/p relay block Out Pnk S328 S329 Seats circuit breaker 30a POWER WINDOWS Power Windows Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Power Windows Wiring Diagram for Chevrolet Silverado 2004 1500: (crew cab) B+ volt B12 Bcm class 2 serial data Body control module (left side of dash) Body relay block C1 7b C10 C7 e Ddm class 2 serial data Driver door module Driver window motor Front passenger door module Front passenger window motor G305 (on left "b" pillar) G306 (on right "b" pillar) Ground Hot at all times Illumination Interior lights system Left front window Left i/p fuse block (left side of dash) Left rear window Left rear window motor Left window switch Logic Lt doors circuit breaker 25a Pwr wnd lockout lr sig Pwr wnd lockout lr signal Pwr wnd lockout rr sig Pwr wnd lockout rr signal Pwr wnd motor lf down cntrl Pwr wnd motor lf up cntrl Pwr wnd motor lr rear down cntrl Pwr wnd motor lr rear up cntrl Pwr wnd motor rf down cntrl Pwr wnd motor rf up cntrl Pwr wnd motor rr rear down cntrl Pwr wnd motor rr rear up cntrl Pwr wnd sw lr down sig Pwr wnd sw lr up sig Pwr wnd sw rr down sig Pwr wnd sw rr up sig Pwr wnd switch lr down signal Pwr wnd switch lr up signal Pwr wnd switch rr down signal Pwr wnd switch rr up signal Right i/p fuse block (right side of dash) Right rear window Right rear window motor Right window switch Rr window (crew cab) Rt doors circuit breaker 25a Splice pack sp205 Switch power Tan Window down Window right front Window up RADIO Base Radio Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Base Radio Wiring Diagram for Chevrolet Silverado 2004 1500: A10 A11 A12 Antenna Aud out - B10 B11 B12 Bare Cell voice sig Coax Common aud sig Computer data lines system Digital radio antenna Digital radio receiver (if equipped) Drain wire G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Left aud sig Left front door speaker Left front tweeter speaker Left i/p fuse block (on lower left side of dash) Left rear door speaker (except standard cab) left rear speaker (standard cab) Lf aud + Lf spk out+ Lf spk out- Lr spk out + Lr spk out - Radio Radio fuse 15a Rf spk out + Rf spk out - Right aud sig Right front door speaker Right front tweeter speaker Right i/p fuse block (on lower right side of dash) Right rear door speaker (except standard cab) right rear speaker (standard cab) Rr spk out+ Rr spk out- Rt aud + Serial data Tan Underhood fuse block (at left side of engine compartment) Vehicle communication interface module (behind passenger air bag module) Voice low ref Voice signal Mid-Line Radio Wiring Diagram, with Rear Seat Audio (1 of 3) for Chevrolet Silverado 2004 1500 List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (1 of 3) for Chevrolet Silverado 2004 1500: (i/p harness) sp205 (in console harness) s330 A10 A11 A12 Antenna B10 B11 B12 B31 Bare Bcm class 2 serial data Body control module (below steering column) C201 C277 Cell voice sig Coax Common aud sig Computer data lines system Drain wire Enable sig Engine controls system G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Inflatable restraint steering wheel module coil Left aud sig Left steering wheel audio control switch Lf spk out+ Lf spk out- Lr aud sig+ Lr aud sig- Lr spk out + Lr spk out - Nca Pnk Prog Radio Radio fuse 15a Radio mute Radio on sig Rear seat audio controller (on rear of center console) Remote radio control signal Rf spk out + Rf spk out - Right aud sig Right steering wheel audio control switch Rr aud sig+ Rr aud sig- Seek dn Seek up Serial data Source dn Source up Steering wheel Tan Underhood fuse block (at left side of engine compartment) Vehicle communication interface module Voice Voice low ref Voice signal Vol dn Vol up Vss signal Mid-Line Radio Wiring Diagram, with Rear Seat Audio (2 of 3) for Chevrolet Silverado 2004 1500 List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (2 of 3) for Chevrolet Silverado 2004 1500: A10 A11 A12 Audio amplifier B10 B11 B12 Bare Drain wire Ground Hot at all times I/p relay block (below lower left side of dash) L spk out+ L spk out- Left front door speaker Left front tweeter speaker Left i/p fuse block (on lower left side of dash) Left rear door speaker (crew cab) left rear speaker (except crew cab) Left subwoofer Lf aud sig+ Lf aud sig- Lf spkr out+ Lf spkr out- Lr aud sig+ Lr aud sig- Lr spkr out+ Lr spkr out- Pnk R spk out+ R spk out- Radio fuse 15a Radio mute Radio on sig Rf aud sig+ Rf aud sig- Rf spkr out+ Rf spkr out- Right front door speaker Right front tweeter speaker Right i/p fuse block (on lower right side a of dash) Right rear door speaker (crew cab) right rear speaker (except crew cab) Right subwoofer Rr aud sig+ Rr aud sig- Rr spkr out+ Rr spkr out- Rsa enable Subwoofer speaker Tan Underhood fuse block (at left side of engine compartment) Mid-Line Radio Wiring Diagram, with Rear Seat Audio (3 of 3) for Chevrolet Silverado 2004 1500 List of elements for Mid-Line Radio Wiring Diagram, with Rear Seat Audio (3 of 3) for Chevrolet Silverado 2004 1500: Antenna Aud out - B11 Bare Coax Com aud sig Computer data lines system Data lines Digital radio antenna Digital radio receiver (if equipped) Drain wire G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Info fuse 15a Lf aud + Lt aud sig Rear seat entertainment assembly (if equipped) Rt aud + Rt aud sig Serial data Splice pack sp250 (near hvac control module) Underhood fuse block (at left side of engine compartment) Mid-Line Radio Wiring Diagram, without Rear Seat Audio (1 of 3) for Chevrolet Silverado 2004 1500 List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (1 of 3) for Chevrolet Silverado 2004 1500: (i/p harness) sp205 (in console harness) A10 A11 A12 Antenna B10 B11 B12 B31 Bare Bcm class 2 serial data Body control module (below steering column) C201 C277 Cell voice sig Coax Common aud sig Computer data lines system Drain wire Enable sig Engine controls system G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Inflatable restraint steering wheel module coil Left aud sig Left steering wheel audio control switch Lf spk out + Lf spk out - Lr aud sig + Lr aud sig - Nca Pnk Prog Radio Radio fuse 15a Radio mute Radio on sig Remote radio control signal Rf spk out + Rf spk out - Right aud sig Right steering wheel audio control switch Rr aud sig + Rr aud sig - S330 Seek dn Seek up Serial data Source dn Source up Steering wheel Tan Underhood fuse block (at left side of engine compartment) Vehicle communication interface module Voice Voice low ref Voice signal Vol dn Vol up Vss signal Mid-Line Radio Wiring Diagram, without Rear Seat Audio (2 of 3) for Chevrolet Silverado 2004 1500 List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (2 of 3) for Chevrolet Silverado 2004 1500: A10 A11 A12 Audio amplifier B10 B11 B12 Bare C1 b2 Drain wire Ground Hot at all times I/p relay block (below lower left side of dash) L spk out+ L spk out- Left front door speaker Left front tweeter speaker Left i/p fuse block (on lower left side of dash) Left rear speaker (crew cab) left rear door speaker (except crew cab) Left subwoofer Lf aud sig+ Lf aud sig- Lf spkr out+ Lf spkr out- Lr aud sig+ Lr aud sig- Lr spkr out+ Lr spkr out- Pnk R spk out+ R spk out- Radio amp fuse 30a Radio fuse 15a Radio mute Radio on sig Rf aud sig+ Rf aud sig- Rf spkr out+ Rf spkr out- Right front door speaker Right front tweeter speaker Right i/p fuse block (on lower right side a of dash) Right rear speaker (crew cab) right rear door speaker (except crew cab) Right subwoofer Rr aud sig+ Rr aud sig- Rr spkr out+ Rr spkr out- Rsa enable Subwoofer speaker Tan Underhood fuse block (at left side of engine compartment) Mid-Line Radio Wiring Diagram, without Rear Seat Audio (3 of 3) for Chevrolet Silverado 2004 1500 List of elements for Mid-Line Radio Wiring Diagram, without Rear Seat Audio (3 of 3) for Chevrolet Silverado 2004 1500: Antenna Aud out - B11 Bare Coax Com aud sig Computer data lines system Data lines Digital radio antenna Digital radio receiver (if equipped) Drain wire G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Info fuse 15a Lf aud + Lt aud sig Nca Rear seat entertainment assembly (if equipped) Rt aud + Rt aud sig Serial data Splice pack sp250 (near hvac control module) Underhood fuse block (at left side of engine compartment) Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (1 of 3) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (1 of 3) for Chevrolet Silverado 2004 1500: (i/p harness) sp205 (in console harness) A10 A11 A12 Antenna B10 B11 B12 B31 Bare Bcm class 2 serial data Body control module (below steering column) C201 C277 Cell voice sig Coax Common aud sig Computer data lines system Drain wire G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Inflatable restraint steering wheel module coil Left aud sig Left steering wheel audio control switch Lf aud sig+ Lf aud sig- Lr aud sig + Lr aud sig - Lr aud sig+ Lr aud sig- Nca Pnk Prog Radio Radio fuse 15a Rear seat audio controller (on rear of center console) Remote radio control signal Rf aud sig + Rf aud sig - Right aud sig Right steering wheel audio control switch Rr aud sig+ Rr aud sig- S210 S333 Seek dn Seek up Serial data Source dn Source up Steering wheel Tan Underhood fuse block (at left side of engine compartment) Vehicle communication interface module (behind right side of dash) Voice Voice low ref Voice signal Vol dn Vol up Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (2 of 3) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (2 of 3) for Chevrolet Silverado 2004 1500: A10 A11 A12 Audio amplifier B10 B11 B12 Bare Computer data lines system Drain wire Ground Hot at all times L spk out+ L spk out- Left front door speaker Left front tweeter speaker Left i/p fuse block (on lower left side l of dash) Left rear speaker Left subwoofer Lf aud sig+ Lf aud sig- Lf spkr out+ Lf spkr out- Lr spkr out+ Lr spkr out- Mic sup volt Noise compensation microphone R spk out+ R spk out- Radio fuse 30a Rf aud sig+ Rf aud sig- Rf spkr out+ Rf spkr out- Right front door speaker Right front tweeter speaker Right i/p fuse block (on lower right side b of dash) Right rear speaker Right subwoofer Rr spkr out+ Rr spkr out- Serial data Subwoofer speaker Tan Underhood fuse block (at left side of engine compartment) Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (3 of 3) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with CD, with Rear Entertainment, with Digital Receiver (3 of 3) for Chevrolet Silverado 2004 1500: (near left "a" pillar) g203 Antenna Aud out - Bare Cd player remote playback device (if equipped) Coax Computer data lines system Digital radio antenna Digital radio receiver (if equipped) Dimming Drain wire Ground Hot at all times I/p relay block (near left kick panel) Info fuse 15a Interior lights system Lf aud + Nca Rt aud + S335 Serial data Splice pack sp250 (near hvac control module) Tan Underhood fuse block (at left side of engine compartment) Premium Sound Radio Wiring Diagram, with CD (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with CD (1 of 2) for Chevrolet Silverado 2004 1500: (i/p harness) sp205 (in console harness) A10 A11 A12 Antenna B10 B11 B12 B31 Bare Bcm class 2 serial data Body control module (below steering column) C201 C277 Cell voice sig Coax Common aud sig Computer data lines Computer data lines system Drain wire G203 (near left "a" pillar) Ground Hot at all times I/p relay block (near left kick panel) Inflatable restraint steering wheel module coil Left aud sig Left steering wheel audio control switch Lf aud sig+ Lf aud sig- Lr aud sig + Lr aud sig - Lr aud sig+ Lr aud sig- Nca Pnk Prog Radio Radio fuse 15a Rear seat audio controller (on rear of center console) Remote radio control signal Rf aud sig + Rf aud sig - Right aud sig Right steering wheel audio control switch Rr aud sig+ Rr aud sig- S210 S333 Seek dn Seek up Serial data Source dn Source up Steering wheel System Tan Underhood fuse block (at left side of engine compartment) Vehicle communication interface module (behind right side of dash) Voice Voice low ref Voice signal Vol dn Vol up Premium Sound Radio Wiring Diagram, with CD (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with CD (2 of 2) for Chevrolet Silverado 2004 1500: A10 A11 A12 Aud out - Audio amplifier B10 B11 B12 Bare Cd player remote playback device Computer data lines system Dimming Drain wire Ground Hot at all times Info fuse 15a Interior lights system L spk out+ L spk out- Left front door speaker Left front tweeter speaker Left i/p fuse block (on lower left side l Left rear speaker Left subwoofer Lf aud + Lf aud sig+ Lf aud sig- Lf spkr out+ Lf spkr out- Lr spkr out+ Lr spkr out- Mic sup volt Noise compensation microphone Of dash) R spk out+ R spk out- Radio fuse 30a Rf aud sig+ Rf aud sig- Rf spkr out+ Rf spkr out- Right front door speaker Right front tweeter speaker Right i/p fuse block (on lower right side b of dash) Right rear speaker Right subwoofer Rr spkr out+ Rr spkr out- Rt aud + S335 Serial data Subwoofer speaker Tan Underhood fuse block (at left side of engine compartment) Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (1 of 2) for Chevrolet Silverado 2004 1500: (i/p harness) sp205 (in console harness) A10 A11 A12 Antenna B10 B11 B12 B31 Bare Bcm class 2 serial data Body control module (below steering column) C201 C277 Cell voice sig Coax Common aud sig Computer data lines system Drain wire G203 (near left "a" pillar) Ground Hot at all times I/p fuse block (below lower left side of dash) Inflatable restraint steering wheel module coil Left aud sig Left steering wheel audio control switch Lf aud sig+ Lf aud sig- Lr aud sig + Lr aud sig - Lr aud sig+ Lr aud sig- Nca Pnk Prog Radio Radio fuse 15a Rear seat audio controller (on rear of center console) Remote radio control signal Rf aud sig + Rf aud sig - Right aud sig Right steering wheel audio control switch Rr aud sig+ Rr aud sig- S210 S333 Seek dn Seek up Serial data Source dn Source up Steering wheel Tan Underhood fuse block (at left side of engine compartment) Vehicle communication interface module (behind right side of dash) Voice Voice low ref Voice signal Vol dn Vol up Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Premium Sound Radio Wiring Diagram, with Digital Radio Receiver (2 of 2) for Chevrolet Silverado 2004 1500: A10 A11 A12 Antenna Aud out - Audio amplifier B10 B11 B12 Bare Coax Computer data lines system Digital radio antenna Digital radio receiver Drain wire Ground Hot at all times L spk out+ L spk out- Left front door speaker Left front tweeter speaker Left i/p fuse block (on lower left side l of dash) Left rear speaker Left subwoofer Lf aud + Lf aud sig+ Lf aud sig- Lf spkr out+ Lf spkr out- Lr spkr out+ Lr spkr out- Mic sup volt Noise compensation microphone R spk out+ R spk out- Radio amp fuse 30a Rf aud sig+ Rf aud sig- Rf spkr out+ Rf spkr out- Right front door speaker Right front tweeter speaker Right i/p fuse block (on lower right side b of dash) Right rear speaker Right subwoofer Rr spkr out+ Rr spkr out- Rt aud + Serial data Subwoofer speaker Tan Underhood fuse block (at left side of engine compartment) SHIFT INTERLOCK Shift Interlock Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Shift Interlock Wiring Diagram for Chevrolet Silverado 2004 1500: A (w/ jf4) A/t shift lock control solenoid (on steering column) B (w/ jf4) B/u lp fuse 20a Btsi fuse 10a E (w/o jf4) F (w/o jf4) G200 (near right "a" pillar) Hot in run or start Park/ neutral position switch (left side of transmission) Pnk S202 Stoplamp switch (top of brake pedal bracket) Underhood fuse block (left side of engine compt, near battery) STARTING/CHARGING 4.3L VIN X 4.3L VIN X, Charging Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Charging Wiring Diagram for Chevrolet Silverado 2004 1500: (at left side of eng compt, near battery) underhood junction block (not used) (on left front of engine compartment) (w/ sba only) 4.3l, 8.1l Auxiliary battery relay (right rear of eng compt) B12 Battery Charge indicator control Computer data lines Exc 4.3l & 8.1l Fuse holder Fusible link G100 (lower left radiator support) G102 (4.3l: lower right front of engine block, exc 4.3l: left side of engine block) G106 (on right front of eng block) G203 (near left "a" pillar) Generator Generator field duty cycle signal Ground Hot in run & start I/p relay block (near left kick panel) Ign 1 volt Ign e fuse 10a Instrument panel cluster Ipc class 2 serial data Left battery Logig Pnk Power distribution system Powertrain control module (pcm) Red Right battery Right battery (w/aux battery) Seo ign fuse 10a Serial data class 2 Sp205 (in i/p harn) Starter Underhood fuse block (at left side of eng compt) Upfitter option Volts W/ seo W/aux battery W/dual batteries W/o seo 4.3L VIN X, Starting Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, Starting Wiring Diagram for Chevrolet Silverado 2004 1500: A/t Acc C1 a11 C1 a3 C1 a9 C1 b12 C2 a7 C2 d11 C2 f3 C2 f9 Clutch start switch (m/t) (on top of clutch pedal bracket) Clutch start switch sign Crank fuse 10a Crank sign D12 F11 G100 (on lower left of radiator core support) G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block) Ign a fuse 40a Ign b fuse 40a Ign e fuse 10a Ignition switch Left battery Lock M/t Nca Off Park/neutral position switch (a/t) (on left side of transmission) Pnk Power distribution system Powertrain control module (pcm) (on left front of engine compartment) Red Run Run off Start Starter enable relay ctrl Starter motor Starter relay Starter solenoid Underhood fuse block (at left side of eng compt) Underhood fuse block (left side of eng compt) Underhood junction block (at left side of eng compt) 4.8L VIN V 4.8L VIN V, Charging Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Charging Wiring Diagram for Chevrolet Silverado 2004 1500: (at left side of eng compt, near battery) underhood junction block (not used) (on left front of engine compartment) (w/ sba only) 4.3l, 8.1l Auxiliary battery relay (right rear of eng compt) B12 Battery Charge indicator control Computer data lines Exc 4.3l & 8.1l Fuse holder Fusible link G100 (lower left radiator support) G102 (4.3l: lower right front of engine block, exc 4.3l: left side of engine block) G106 (on right front of eng block) G203 (near left "a" pillar) Generator Generator field duty cycle signal Ground Hot in run & start I/p relay block (near left kick panel) Ign 1 volt Ign e fuse 10a Instrument panel cluster Ipc class 2 serial data Left battery Logig Pnk Power distribution system Powertrain control module (pcm) Red Right battery Right battery (w/aux battery) Seo ign fuse 10a Serial data class 2 Sp205 (in i/p harn) Starter Underhood fuse block (at left side of eng compt) Upfitter option Volts W/ seo W/aux battery W/dual batteries W/o seo 4.8L VIN V, Starting Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, Starting Wiring Diagram for Chevrolet Silverado 2004 1500: A/t Acc C1 a11 C1 a3 C1 a9 C1 b12 C2 a7 C2 d11 C2 f3 C2 f9 Clutch start switch (m/t) (on top of clutch pedal bracket) Clutch start switch sign Crank fuse 10a Crank sign D12 F11 G100 (on lower left of radiator core support) G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block) Ign a fuse 40a Ign b fuse 40a Ign e fuse 10a Ignition switch Left battery Lock M/t Nca Off Park/neutral position switch (a/t) (on left side of transmission) Pnk Power distribution system Powertrain control module (pcm) (on left front of engine compartment) Red Run Run off Start Starter enable relay ctrl Starter motor Starter relay Starter solenoid Underhood fuse block (at left side of eng compt) Underhood fuse block (left side of eng compt) Underhood junction block (at left side of eng compt) 5.3L VIN T 5.3L VIN T, Charging Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Charging Wiring Diagram for Chevrolet Silverado 2004 1500: (at left side of eng compt, near battery) underhood junction block (not used) (on left front of engine compartment) (w/ sba only) 4.3l, 8.1l Auxiliary battery relay (right rear of eng compt) B12 Battery Charge indicator control Computer data lines Exc 4.3l & 8.1l Fuse holder Fusible link G100 (lower left radiator support) G102 (4.3l: lower right front of engine block, exc 4.3l: left side of engine block) G106 (on right front of eng block) G203 (near left "a" pillar) Generator Generator field duty cycle signal Ground Hot in run & start I/p relay block (near left kick panel) Ign 1 volt Ign e fuse 10a Instrument panel cluster Ipc class 2 serial data Left battery Logig Pnk Power distribution system Powertrain control module (pcm) Red Right battery Right battery (w/aux battery) Seo ign fuse 10a Serial data class 2 Sp205 (in i/p harn) Starter Underhood fuse block (at left side of eng compt) Upfitter option Volts W/ seo W/aux battery W/dual batteries W/o seo 5.3L VIN T, Starting Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, Starting Wiring Diagram for Chevrolet Silverado 2004 1500: A/t Acc C1 a11 C1 a3 C1 a9 C1 b12 C2 a7 C2 d11 C2 f3 C2 f9 Clutch start switch (m/t) (on top of clutch pedal bracket) Clutch start switch sign Crank fuse 10a Crank sign D12 F11 G100 (on lower left of radiator core support) G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block) Ign a fuse 40a Ign b fuse 40a Ign e fuse 10a Ignition switch Left battery Lock M/t Nca Off Park/neutral position switch (a/t) (on left side of transmission) Pnk Power distribution system Powertrain control module (pcm) (on left front of engine compartment) Red Run Run off Start Starter enable relay ctrl Starter motor Starter relay Starter solenoid Underhood fuse block (at left side of eng compt) Underhood fuse block (left side of eng compt) Underhood junction block (at left side of eng compt) 5.3L VIN Z 5.3L VIN Z, Charging Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Charging Wiring Diagram for Chevrolet Silverado 2004 1500: (at left side of eng compt, near battery) underhood junction block (not used) (on left front of engine compartment) (w/ sba only) 4.3l, 8.1l Auxiliary battery relay (right rear of eng compt) B12 Battery Charge indicator control Computer data lines Exc 4.3l & 8.1l Fuse holder Fusible link G100 (lower left radiator support) G102 (4.3l: lower right front of engine block, exc 4.3l: left side of engine block) G106 (on right front of eng block) G203 (near left "a" pillar) Generator Generator field duty cycle signal Ground Hot in run & start I/p relay block (near left kick panel) Ign 1 volt Ign e fuse 10a Instrument panel cluster Ipc class 2 serial data Left battery Logig Pnk Power distribution system Powertrain control module (pcm) Red Right battery Right battery (w/aux battery) Seo ign fuse 10a Serial data class 2 Sp205 (in i/p harn) Starter Underhood fuse block (at left side of eng compt) Upfitter option Volts W/ seo W/aux battery W/dual batteries W/o seo 5.3L VIN Z, Starting Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN Z, Starting Wiring Diagram for Chevrolet Silverado 2004 1500: A/t Acc C1 a11 C1 a3 C1 a9 C1 b12 C2 a7 C2 d11 C2 f3 C2 f9 Clutch start switch (m/t) (on top of clutch pedal bracket) Clutch start switch sign Crank fuse 10a Crank sign D12 F11 G100 (on lower left of radiator core support) G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block) Ign a fuse 40a Ign b fuse 40a Ign e fuse 10a Ignition switch Left battery Lock M/t Nca Off Park/neutral position switch (a/t) (on left side of transmission) Pnk Power distribution system Powertrain control module (pcm) (on left front of engine compartment) Red Run Run off Start Starter enable relay ctrl Starter motor Starter relay Starter solenoid Underhood fuse block (at left side of eng compt) Underhood fuse block (left side of eng compt) Underhood junction block (at left side of eng compt) 6.0L VIN N 6.0L VIN N, Charging Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Charging Wiring Diagram for Chevrolet Silverado 2004 1500: (at left side of eng compt, near battery) underhood junction block (not used) (on left front of engine compartment) (w/ sba only) 4.3l, 8.1l Auxiliary battery relay (right rear of eng compt) B12 Battery Charge indicator control Computer data lines Exc 4.3l & 8.1l Fuse holder Fusible link G100 (lower left radiator support) G102 (4.3l: lower right front of engine block, exc 4.3l: left side of engine block) G106 (on right front of eng block) G203 (near left "a" pillar) Generator Generator field duty cycle signal Ground Hot in run & start I/p relay block (near left kick panel) Ign 1 volt Ign e fuse 10a Instrument panel cluster Ipc class 2 serial data Left battery Logig Pnk Power distribution system Powertrain control module (pcm) Red Right battery Right battery (w/aux battery) Seo ign fuse 10a Serial data class 2 Sp205 (in i/p harn) Starter Underhood fuse block (at left side of eng compt) Upfitter option Volts W/ seo W/aux battery W/dual batteries W/o seo 6.0L VIN N, Starting Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN N, Starting Wiring Diagram for Chevrolet Silverado 2004 1500: A/t Acc C1 a11 C1 a3 C1 a9 C1 b12 C2 a7 C2 d11 C2 f3 C2 f9 Clutch start switch (m/t) (on top of clutch pedal bracket) Clutch start switch sign Crank fuse 10a Crank sign D12 F11 G100 (on lower left of radiator core support) G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block) Ign a fuse 40a Ign b fuse 40a Ign e fuse 10a Ignition switch Left battery Lock M/t Nca Off Park/neutral position switch (a/t) (on left side of transmission) Pnk Power distribution system Powertrain control module (pcm) (on left front of engine compartment) Red Run Run off Start Starter enable relay ctrl Starter motor Starter relay Starter solenoid Underhood fuse block (at left side of eng compt) Underhood fuse block (left side of eng compt) Underhood junction block (at left side of eng compt) SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500: 1362 (or 353) 2306 (or 371) Alo: w/ front passenger/ child presence detector B tan C10 Class 2 serial data Control G200 (behind right side of dash, near right "a" pillar) G304 (under right front seat) Ground High control Hot in run or start I/p junction block (right side of dash behind access panel) I/p module disable switch signal I/p module suppression indicator control I/p relay block (below left side of dash, left of steering column) Ignition 1 Ignition 1 voltage Inflatable restraint i/p module (behind right side of dash) Inflatable restraint i/p module disable switch Inflatable restraint sensing/diagnostic module (under left front seat) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Key switch Left inflatable restraint front end sensor (on left front of vehicle, by core support) Left signal Logic Low control Low reference Nca Off On-w/o alo auto-w/ alo Others Pnk Red Red (or pnk) Right inflatable restraint front end sensor (on right front of vehicle, by core support) Right inflatable restraint side impact sensor Right signal Right voltage S205 (in i/p harness) Shorting bar Signal Sir fuse 15a Stage 1 Stage 2 Tan Twisted pair wires Underhood fuse block (at left side of eng compt, near battery) W/ c99 only W/ front passenger/ child presence detector Supplemental Restraints Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500: Air bag C10 Class 2 serial data Data link connector (lower left side of dash) Driver seat belt switch Front passenger seat belt switch G304 (under right front seat) Ground I/p mod disable sw sig I/p mod supp ind ctrl I/p relay block (below left side of dash, left of steering column) Ign Ignition 1 voltage Inflatable restraint passenger air bag on/off indicator Inflatable restraint passenger presence system (pps) module (under front passenger seat) Inflatable restraint passenger presence system sensor Inflatable restraint passenger seat belt tension retractor sensor Inside rearview mirror instrument Instrument panel cluster Ipc class 2 serial data Left inflatable restraint seat position switch Memory systems Off Pass air bag off ind ctrl Pass air bag on ind ctrl Pass seat belt tens 5v ref Pass seat belt tens lo ref Pass seat belt tens sig Pnk Pps sens 5v ref Pps sens lo ref Pps sens sig Red Right inflatable restraint seat position switch Splice pack sp205 (in i/p harness near fuse block) Tan TRANSMISSION Transfer Case Wiring Diagram, 2-Speed Automatic for Chevrolet Silverado 2004 1500 List of elements for Transfer Case Wiring Diagram, 2-Speed Automatic for Chevrolet Silverado 2004 1500: (behind right side of dash, near right "a" pillar) (left front of engine compt) powertrain control module (on left front body mount) g110 +5v ref 2-hi ind 2wd 4 hi 4 lo 4-hi ind 4-lo ind 4wd fuse 15a 4wd indicator lamp 4wd lo sig 4wd sw sig Awd Awd ind Axle ctrl Axle sw sig Battery Brake control Class ii data Ctrl Data link connector (under left side of dash, below steering column) Encoder Encoder low Encoder sig Except seo Front axle actuator Front propshaft speed sensor Ft shaft hi Ft shaft lo G200 G203 (behind left side of dash, near left "a" pillar) Gnd Ground Hot at all times Hot in run Hot in run or start I/p relay block (near c1 Ign e fuse 10a Illumination Instrument panel cluster Interior lights system Left i/p fuse block (lower left side of dash) Left kick panel) Lock sol ctrl Logic Motor ctrl a Motor ctrl b Nca Neutral ind Pnk Rear propshaft speed sensor Red Rr shaft hi Rr shaft lo Seo Seo ign fuse 10a Shift motor Splice pack sp205 (in i/p harn) Tan Transfer case encoder motor Transfer case shift control module (left side of i/p area, behind knee bolster, above parking brake assy) Transfer case shift control switch Trec fuse 30a Underhood fuse block (left side of engine compt) Transfer Case Wiring Diagram, 2-Speed Manual for Chevrolet Silverado 2004 1500 List of elements for Transfer Case Wiring Diagram, 2-Speed Manual for Chevrolet Silverado 2004 1500: (in engine harness) s165 (w/ allison transmission) 4wd fuse 15a 4wd indicator lamp Data link connector (under left side of dash below steering column) Dsl(ecm) gas (pcm) E2 c1 Electronic brake control module (on left side of inner frame) Except seo Front axle actuator G110 (on left front body mount) Hot in run Hot in run or start Ign e fuse 10a Instrument panel cluster Left i/p fuse block (lower left side of dash) Logic Pnk Powertrain control module (gas engines) or engine control module (diesel) (left front of engine compt) Seo Seo ign fuse 10a Splice pack sp205 (in i/p harn) Transfer case shift control switch (on top of transfer case) Transmission control module (w/ allison trans) (left front of engine compt) Underhood fuse block (left side of engine compt) 4.3L VIN X 4.3L VIN X, A/T Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.3L VIN X, A/T Wiring Diagram for Chevrolet Silverado 2004 1500: (behind left side of dash) g203 (not used) (right rear of engine block) g103 +5v 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4wd circuit (transfer case & front axle switch) 4wd low A/t fluid pressure manual manual valve position switch Automatic transmission (4l60-e) B10 B11 B12 Body control module (below steering column) Brake fuse 10a Brk sw C12 Cls 2 data Cruise control system Data link connector (below steering column) E11 Ect sig Engine coolant temperature sensor (rear of left cylinder head) Fluid temp sensor Frt axle sw Fuel pump & sensor assembly G103 (right rear of engine block) Gnd Hot at all times Hot in run Hot in run & start Hot in run, acc & start I/p relay block (below left side of dash) Ign Ign0 fuse 10a Instrument cluster Instrument panel cluster (ipc) Intake air temper- ature/mass air flow sensor Ipc/dic fuse 10a Left i/p fuse block (lower left side of dash) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pcm 1 fuse 15a Pcm b fuse 20a Pnk Powertrain control module (left front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Red a Rev S103 S312 Sens gnd Splice pack sp205 (in dash harness) Stoplight switch (top of brake pedal bracket) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Throttle position sensor (on throttle body assy) Tow/haul switch Tp sig Trans rng a Underhood fuse block (left side of engine c2 compt, near the battery) Underhood fuse block (left side of engine compt, near battery) Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case) Vss hi Vss lo 4.8L VIN V 4.8L VIN V, A/T Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 4.8L VIN V, A/T Wiring Diagram for Chevrolet Silverado 2004 1500: (behind left side of dash) g203 (left rear of engine compt) throttle actuator control module (not used) (right rear of engine block) g103 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4wd circuit (transfer case & front axle switch) 4wd low A/t fluid pressure manual manual valve position switch Automatic transmission (4l60-e) B10 B11 B12 Body control module (below steering column) Brake fuse 10a Brk sw C12 Cls 2 data Data link connector (below steering column) E11 Ect sig Engine controls system Engine coolant temperature sensor (front of left cylinder head) Except seo Fluid temp sensor Frt axle sw G203 Gnd Hot at all times Hot in run Hot in run & start Hot in run, acc & start I/p relay block (below left side of dash) Ign Ign0 fuse 10a Instrument cluster Instrument panel cluster (ipc) Ipc/dic fuse 10a Left i/p fuse block (lower left side of dash) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pcm 1 fuse 15a Pcm b fuse 20a Pnk Powertrain control module (left front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Red a Rev S103 S312 Sens gnd Seo Seo b1 fuse 15a Serial data Splice pack sp205 (in i/p harness) Stoplight switch (top of brake pedal bracket) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Tow/haul switch Trans rng a Underhood fuse block (left side of engine c2 compt, near the battery) Underhood fuse block (left side of engine compt, near battery) Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case) Vss hi Vss lo 5.3L VIN T 5.3L VIN T, A/T Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 5.3L VIN T, A/T Wiring Diagram for Chevrolet Silverado 2004 1500: (behind left side of dash) g203 (left rear of engine compt) throttle actuator control module (not used) (right rear of engine block) g103 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4wd circuit (transfer case & front axle switch) 4wd low A/t fluid pressure manual manual valve position switch Automatic transmission (4l60-e) B10 B11 B12 Body control module (below steering column) Brake fuse 10a Brk sw C12 Cls 2 data Data link connector (below steering column) E11 Ect sig Engine controls system Engine coolant temperature sensor (front of left cylinder head) Except seo Fluid temp sensor Frt axle sw G203 Gnd Hot at all times Hot in run Hot in run & start Hot in run, acc & start I/p relay block (below left side of dash) Ign Ign0 fuse 10a Instrument cluster Instrument panel cluster (ipc) Ipc/dic fuse 10a Left i/p fuse block (lower left side of dash) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pcm 1 fuse 15a Pcm b fuse 20a Pnk Powertrain control module (left front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Red a Rev S103 S312 Sens gnd Seo Seo b1 fuse 15a Serial data Splice pack sp205 (in i/p harness) Stoplight switch (top of brake pedal bracket) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Tow/haul switch Trans rng a Underhood fuse block (left side of engine c2 compt, near the battery) Underhood fuse block (left side of engine compt, near battery) Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case) Vss hi Vss lo 6.0L VIN U 6.0L VIN U, A/T Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for 6.0L VIN U, A/T Wiring Diagram for Chevrolet Silverado 2004 1500: (behind left side of dash) g203 (left rear of engine compt) throttle actuator control module (not used) (right rear of engine block) g103 1-2 shift solenoid 1-2 ss 2-3 shift solenoid 2-3 ss 3-2 shift solenoid 3-2 ss 4wd circuit (transfer case & front axle switch) 4wd low A/t fluid pressure manual manual valve position switch Automatic transmission (4l60-e) B10 B11 B12 Body control module (below steering column) Brake fuse 10a Brk sw C12 Cls 2 data Data link connector (below steering column) E11 Ect sig Engine controls system Engine coolant temperature sensor (front of left cylinder head) Except seo Fluid temp sensor Frt axle sw G203 Gnd Hot at all times Hot in run Hot in run & start Hot in run, acc & start I/p relay block (below left side of dash) Ign Ign0 fuse 10a Instrument cluster Instrument panel cluster (ipc) Ipc/dic fuse 10a Left i/p fuse block (lower left side of dash) Lo ref Malfunction indicator lamp Mil ctrl Park/neutral position switch (left side of transmission) Pc sol hi Pc sol lo Pcm 1 fuse 15a Pcm b fuse 20a Pnk Powertrain control module (left front of engine compt) Press ctrl solenoid Prnd a Prnd b Prnd c Prnd p Range b Range c Red Red a Rev S103 S312 Sens gnd Seo Seo b1 fuse 15a Serial data Splice pack sp205 (in i/p harness) Stoplight switch (top of brake pedal bracket) Tan Tcc pwm Tcc pwm solenoid Tcc sol Tcc solenoid Tft sens sig Tow/haul switch Trans rng a Underhood fuse block (left side of engine c2 compt, near the battery) Underhood fuse block (left side of engine compt, near battery) Vehicle speed sensor (2wd: left rear of transmission) (4wd: left side of transfer case) Vss hi Vss lo WARNING SYSTEMS Warning Systems Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500 List of elements for Warning Systems Wiring Diagram (1 of 2) for Chevrolet Silverado 2004 1500: (behind left side of dash, near left "a" pillar) g203 (on left "b" pillar) g305 (on right "b" pillar) g306 5v reference A12 Accessory voltage Anl/drl defeat Auto B11 B12 Battery Body control module (bcm) (on lower left side of dash, below steering column) Crew cab only D12 Dimming input Dimming return E11 E12 G203 (behind left side of dash, near left "a" pillar) Ground Ground distribution system Head Headlamp switch Headlamps on signal Hot at all times Hot in acc & run Hot in acc, run & start Hot in run & start I/p relay block (near left kick panel) Ignition 0 voltage Ignition 1 voltage Ignition key alarm switch Key in ignition switch Left front door ajar sw Left i/p fuse block (on lower left side of dash) Left rear door ajar sw Left rear door latch assembly Park Park brake sw signal Park brake switch (part of park brake assembly) Park lamp on signal Pnk Power distribution system Right front door ajar sw Right rear door ajar sw Right rear door latch assembly S212 (in i/p harness) S217 Serial data Tbc 2a fuse 15a Tbc 2b fuse 15a Tbc 2c fuse 15a Tbc accy fuse 10a Tbc batt fuse 10a Tbc ign 0 fuse 10a Tbc ign 1 fuse 10a Underhood fuse block (at left side of engine compartment) Warning Systems Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500 List of elements for Warning Systems Wiring Diagram (2 of 2) for Chevrolet Silverado 2004 1500: (behind right side of dash, near right "a" pillar) g200 Base Computer data lines system Data link connector (dlc) (partial) (under left side of dash, below steering column) Door ajar switch Driver door latch assembly Driver door module (ddm) (in driver's door) Driver seat belt switch Except 6.6l vin 2 6.6l vin 2 Exterior lights system Front passenger door latch assembly Front passenger door module (fpdm) (in right front door) Ground distribution system Ign Inflatable restraint sensing & diagnostic module (sdm) (under left front seat) Instrument panel cluster (ipc) Left door ajar sw Left i/p fuse block (on lower left side of dash) Left seat belt Left turn Logic Low reference Pnk Powertrain control module (pcm) or engine control module (ecm) (on left front of engine compartment) Radio Right i/p fuse block (on lower right side of dash) Right turn Seat belt Serial data Sp205 (in i/p harness) Tan W/convenience package comfort & decor level 3 W/memory seats WIPER/WASHER Front Wiper/Washer Wiring Diagram for Chevrolet Silverado 2004 1500 List of elements for Front Wiper/Washer Wiring Diagram for Chevrolet Silverado 2004 1500: Accessory voltage G100 (on left front body mount) G200 (near right "a" pillar) G203 (near left "a" pillar) Ground Hot at all times Hot in run and acc Left i/p fuse block (behind lower left side of dash) Lsd Mist Off Pnk Pulse Red S100 S202 S217 Tan Turn signal multi- function switch Underhood fuse block (on left side of engine compt) W/s wash fuse 15a W/s wash relay W/s wiper fuse 25a Wash Windshield washer fluid pump (on washer fluid reservoir) Windshield washer relay cntrl Windshield wiper high signal Windshield wiper motor module (left side of cowl) Windshield wiper switch signal Windshield wiper/ washer switch