GROUND DISTRIBUTION – Chevrolet Chevy Express G3500 2003 – SYSTEM WIRING DIAGRAMS

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G3500 2003

List of elements for Ground Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G3500 2003:

• (4.3l)
• (4.3l) ignition control module (icm)
• (4.8l/5.3l/6.0l)
• (forward lamp harness, approx 12 cm from left headlamp connector breakout)
• (in engine harness, approx 4 cm from knock sensor breakout)
• A/c compressor clutch
• A/c low pressure switch
• Battery
• Blower motor resistor assembly
• Brake fluid level switch
• Electronic brake control module (ebcm)
• Engine oil level switch
• Fuel pump relay
• G100 (left front of engine compt)
• G101 (right front of engine compt)
• G102 (on left rear of engine)
• G103 (on right rear of engine)
• G104 (on lower right front of engine)
• G105 (on right front frame rail, in engine compt)
• G106 (on right front of engine compt)
• G300 (on left frame rail, near ebcm)
• G301 (behind left kick panel)
• Horn assembly
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Ignition coil 7
• Ignition coil 8
• Inflatable restraint i/p module disable switch
• Inflatable restraint sensing & diagnostic module (sdm)
• Intake air temperature (iat)/ mass air flow (maf) sensor
• Left front marker lamp
• Left front park/turn signal lamp
• Left headlamp (w/ sealed beam headlamps)
• Left high beam headlamp (w/ composite headlamps)
• Left low beam headlamp (w/ composite headlamps)
• Nca
• On top right side of engine)
• Park/ neutral position (pnp) switch
• Powertrain control module (pcm)
• Right front marker lamp
• Right front park/turn signal lamp
• Right headlamp (w/ sealed beam headlamps)
• Right high beam headlamp (w/ composite headlamps)
• Right low beam headlamp (w/ composite headlamps)
• S101 s101 (in engine harness, approx 43 cm from underhood lamp breakout)
• S118 (forward lamp harness, approx 13 cm from right headlamp connector breakout)
• Underhood fuse block
• Underhood lamp

Ground Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G3500 2003

List of elements for Ground Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G3500 2003:

• (if equipped) cruise control module
• (if equipped) power brake booster fluid flow alarm switch
• (if equipped) rear seat audio control
• (if equipped) remote control door lock receiver
• (in dash harness, approx 5 cm from inflatable restraint dash module connector breakout)
• (in dash harness, approx 8 cm from c200 breakout)
• (rv/upfitter) provisional
• A/t shift lock control solenoid
• A12
• Air temperature actuator
• Auxiliary power outlet
• Auxiliary relay 24
• Body control module (bcm)
• Body fuse block
• C200 breakout)
• C222
• Cargo unlk relay 27
• Cigar lighter
• Ctsy lp relay 26
• Data link connector (dlc)
• Door lks relay 30
• Drv unlk relay 28
• G302 (behind left kick panel)
• G303 (behind left kick panel)
• G304 (behind right kick panel)
• Hazard switch
• Headlamp & panel dimmer switch
• Headlamp dimmer switch
• Hvac control assembly
• Ignition key alarm switch
• Inside rearview mirror
• Instrument panel cluster
• Pass unlk relay 31
• Radio
• Rr defog relay 25
• S264 (in steering column harness, approx 29 cm from c200)
• Tan
• Tow/haul switch
• Turn signal/ hazard flasher module
• Turn signal/ multifunction switch
• Vehicle communication interface module (vcim)
• W/ global positioning system (gps)
• W/ heated outside mirrors & rear defogger
• Windshield washer fluid pump
• Windshield wiper motor
• Windshield wiper/washer switch
• Wnd rap relay 23

Ground Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G3500 2003

List of elements for Ground Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G3500 2003:

• (auxiliary hvac)
• (if equipped) auxiliary blower motor switch
• (if equipped) auxiliary hvac control processor
• (if equipped) driver door lock switch
• (if equipped) driver window switch
• (if equipped) front passenger door lock switch
• (if equipped) front passenger seat adjuster switch
• (if equipped) front passenger window switch
• (if equipped) left rear door ajar switch
• (if equipped) left vanity mirror lamp
• (if equipped) rear auxiliary hvac control assembly
• (rv/ upfitter)
• (rv/upfitter) provisional p
• C320
• C321
• C409
• Cargo/ cutaway
• Courtesy/ reading lamp (mid)
• Courtesy/ reading lamp (rear)
• Driver mini wedge (door jamb switch)
• Driver outside rearview mirror
• Driver seat adjuster switch
• Except rv/upfitter
• From splice pack sp347 a (diagram 3 of 4)
• From splice pack sp347 b (diagram 3 of 4)
• Front auxiliary hvac control assembly
• Front courtesy/ reading lamp
• Front passenger mini wedge (door jamb switch)
• G347 (on bottom of left "b" pillar)
• If equipped
• Left front seat belt switch
• Left vanity mirror lamp
• Nca
• Outside rearview mirror switch
• Passenger
• Passenger outside rearview mirror
• Provisional b
• Provisional c
• Right rear door ajar switch
• Right vanity mirror lamp
• Rv/upfitter
• S204 (in vanity mirror lamp harness, approx 13 cm from c203)
• S304 (in driver seat harness, approx 11 cm from driver seat adjuster switch connector breakout)
• S500 (in left front door harness, approx 6 cm from left front door door speaker breakout)
• S600 (in right front door harness, approx 7 cm from right front door speaker breakout)
• Splice pack sp347
• To splice pack sp347 (diagram 3 of 4)
• W/ electronic side door lock control
• W/ outside heated mirrors
• W/ power seat adjuster
• W/o electronic side door lock control
• W/o power seat adjuster
• W/o rear auxiliary controls

Ground Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G3500 2003

List of elements for Ground Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G3500 2003:

• (commercial/tradesman package)
• (if equipped) cruise control module
• (if equipped) left rear window defogger grid
• (if equipped) left trailer stop/turn relay
• (if equipped) mini wedge (cargo door jamb switch)
• (if equipped) rear cargo door lock switch
• (if equipped) right rear window defogger grid
• (if equipped) right trailer stop/turn relay
• (in body harness, approx 10 cm from chmsl connector breakout)
• (in body harness, approx 16 cm from chmsl connector breakout)
• (w/ rv-upfitter option)
• (w/o rv-upfitter option)
• 55 gallon fuel tank
• Auxiliary air temperature actuator
• Auxiliary blower motor
• Auxiliary heater
• Auxiliary mode actuator
• B11
• Brake pressure differential switch
• C405
• Center high mounted stop lamp (chmsl)
• Cutaway
• Dome fluorescent work lamp 1
• Dome fluorescent work lamp 2
• Except 55 gallon fuel tank
• Except rv/ upfitter
• Fluorescent work lamp connector)
• Fuel pump & sender assembly
• G400 (on inner left rear frame rail)
• G401 (on top of right "d" pillar)
• G402 (on top of left "d" pillar)
• G403 (on center of left "d" pillar)
• Heavy duty
• Left backup lamp
• Left front dome fluorescent work lamp
• Left front side front access panel actuator
• Left front side rear access panel actuator
• Left rear dome fluorescent work lamp
• Left rear side front access panel actuator
• Left rear side rear access panel actuator
• Left tail/stop & turn signal lamp
• Left taillamp assembly
• License lamp
• Light duty
• Nca
• Nca nca
• Passenger/ cargo
• Rear dome lamp
• Rear hvac system
• Resistor
• Right backup lamp
• Right dome fluorescent work lamp
• Right side front access panel actuator
• Right side rear access panel actuator
• Right tail/stop & turn signal lamp
• Right taillamp assembly
• S231
• S300 (in prp/uf2 harness, approx 42 cm from left front side front access panel actuator)
• S403 s403 (in body harness, approx 6 cm from g401 breakout)
• S411 (in rear hvac harness, approx 6 cm from auxiliary blower motor connector breakout)
• S902 (in right rear door harness, approx 19 cm from license lamp connector breakout)
• Stop lamp switch
• Trailer wiring harness
• Turn/ hazard flasher module
• Underhood fuse block