POWER DISTRIBUTION – Chevrolet Chevy Express G2500 2008 – SYSTEM WIRING DIAGRAMS

POWER DISTRIBUTION

4.3L VIN X

4.3L VIN X, Power Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G2500 2008:

• (on left side of engine compt) underhood fuse block
• Abs mdl fuse 60 40a
• Abs mtr fuse 61 50a
• Aux pwr outlet fuse 33 20a
• Battery
• Bcm 1 fuse 20 10a
• Bcm 2 fuse 37 15a
• Bcm 3 fuse 26 10a
• Bcm 4 fuse 22 10a
• Bcm 5 fuse 27 10a
• Bcm 6 fuse 23 10a
• Bcm 7 fuse 25 10a
• Blower motor resistor assembly
• Body control module (bcm)
• Body fuse block (under left front seat)
• Center console 1 accessory power outlet
• Center console 2 accessory power outlet
• Cigar lighter
• Cnstr vent sol fuse 17 10a
• Data link connector (dlc)
• Ecm batt fuse 54 10a
• Electronic brake control module (ebcm)
• Engine control module (ecm)
• Evaporative emission (evap) canister vent solenoid valve
• Fcsm batt fuse 15 20a
• From cmps fuse 2 (diagram 4 of 4)
• From run relay 39 (diagram 4 of 4)
• Frt blwr fuse 66 40a
• Fuel pump flow control module (5.3l)
• Fusible link 2
• Fusible link 3
• G302 (behind left kick panel)
• G304 (behind right kick panel)
• Generator
• Instrument panel cluster (ipc) (w/ odometer security wiring provision (seo))
• J247
• J249
• Ltr/dlc fuse 38 20a
• Red
• Seo fuse 21 10a
• Starter motor
• Tcm batt fuse 44 10a
• To high beam pcb relay (diagram 2 of 4)
• Trailer connector
• Transmission control module (tcm)
• Trlr wrg fuse 35 30a
• Trlr wrg fuse 62 30a
• Upfitter provisional
• Upftr aux 2 fuse 35 50a
• Upftr aux 2 relay 42 (cutaway, ambulance & rv upfitters)
• W/ active brake control
• W/ cigar lighter
• W/ cutaway upfitter
• W/ rv upfitter
• W/ truck trailer
• W/o active brake control
• W/o cigar lighter
• X222
• X321

4.3L VIN X, Power Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G2500 2008:

• (in engine harness, 5 cm from x101 breakout) j120
• (in even ignition/ coil module jumper harness, on top right side of engine) j185
• (in odd ignition/coil module jumper harness, on top left side of engine) j184
• (on left side of engine compt) underhood fuse block
• 4.3l
• A/c cmprsr relay 74 (manual a/c)
• Central sequential fuel injection (central sfi) (4.3l)
• Crnk relay 73
• Drl pcb relay
• Ecm pwr/trn fuse 50 10a
• Engine control module (ecm)
• Evaporative emission (evap) canister purge solenoid valve
• Even ign inj fuse 52 (except 4.3l) 20a
• Except 4.3l
• From trlr wrg fuse a (diagram 1 of 4)
• Fuel injector
• Fuel pump relay 72
• Heated oxygen sensor (ho2s) bank 1 sensor 1
• Heated oxygen sensor (ho2s) bank 1 sensor 2
• Heated oxygen sensor (ho2s) bank 2 sensor 1
• Heated oxygen sensor (ho2s) bank 2 sensor 2
• Hi wpr relay 70
• High beam pcb relay
• Horn pcb relay
• Ignition coil
• Ignition control module (icm)
• Lo beam pcb relay
• Maf/cnstr vent fuse 49 15a
• Mass air flow (maf)/ intake air temperature (iat) sensor
• Mega fuse 77 125a
• Nca
• O2 snsr 1 fuse 46 10a
• O2 snsr 2 fuse 56 10a
• Odd ign inj fuse 55 20a
• Pnk
• Pwr/trn relay 76
• Stop lamps pcb relay (cutaway)
• To body fuse block (diagram 4 of 4)
• To run/crnk relay 69 (diagram 3 of 4)
• Trailer lh stop/turn pcb relay (w/ truck trailer)
• Trailer rh stop/turn pcb relay (w/ truck trailer)
• V6 fuel inj fuse 59 15a
• Washer pcb relay
• Wpr fuse 39 25a
• Wpr relay 7

4.3L VIN X, Power Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G2500 2008:

• (in chassis harness, 7 cm from ecbm breakout)
• (in prp/uf2 harness, 7 cm from breakout for rear fuse block) j312
• (in steering column harness, 30 cm from x200 connector) j205
• 4.3l
• 4.8l & 6.0l
• 5.3l
• Acc
• Air bag fuse 34 10a
• Automatic transmission
• Body control module (bcm)
• Brk sw fuse 32 10a
• Dome fluorescent work lamps fuse 2 10a
• Ecm ign fuse 48 15a
• Electronic brake control module (ebcm)
• Engine control module (ecm)
• Engine control module (edm)
• Except 4.3l
• Fluorescent work lamp relay
• From body fuse block (diagram 4 of 4)
• From mega fuse 77 (diagram 2 of 4)
• Fscm ign fuse 11 10a
• Fuel pump flow control module
• Fuel pump flow control module (5.3l)
• G102 (on left rear of engine)
• Ignition switch
• Inflatable restraint i/p module disable switch
• Inflatable restraint i/p module indicator
• Inflatable restraint sensing & diagnostic module (sdm)
• Instrument panel cluster (ipc)
• Ip clstr fuse 30 10a
• J102
• J115 (in engine harness, 15 cm from x101 breakout)
• J203 (in steering column harness, 27 cm from x200 connector)
• J302 (in prp/uf2 harness, 15 cm from rear fuse block)
• J303 (in prp/uf2 harness, 8 cm from rear fuse block)
• Key-in switch
• Left front access panel relay 5
• Left rear access panel relay 1
• Off
• Panel actuator fuse 3 45a
• Pnk
• Rear fuse block (on left "b" pillar)
• Red
• Right access panel relay 6
• Run
• Run/crnk relay 69
• Start
• Steering wheel speed/ position sensor
• Stop lamp switch
• Str/whl snsr fuse 36 (w/ active control brake) 10a
• Tcm ign fuse 47 15a
• Theft deterrent module (tdm)
• Trans fuse 51 15a
• Transmission control module (tcm)
• Underhood fuse block (on left side of engine compt)
• W/ active brake control
• W/ cargo
• W/ manual suppression
• W/ power brake
• W/o rv upfitter & manual suppression
• X175

4.3L VIN X, Power Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 4.3L VIN X, Power Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G2500 2008:

• (except rear auxiliary & rv upfitter: in front headliner harness, 15 cm from x205 breakout towards left vanity mirror lamp connector) (w/ rear auxiliary & rv upfitter: in upfitter hvac control harness, 88 cm from x303 breakout) (except rv upfitter: in front headliner harness, 52 cm from x304 breakout)
• (in rear hvac harness, 13 cm from auxiliary blower motor connector breakout) j405
• (not used)
• (under left front seat) body fuse block
• Air bag aos fuse 32 10a
• Air temperature actuator
• All drs lock pcb relay
• Auxiliary air temperature actuator
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary hvac control module
• Auxiliary mode actuator
• Bck/up lamp pcb relay
• Body control module (bcm)
• Cgo unlck pcb relay
• Chime module
• Cmps fuse fuse 2 10a
• Driver seat adjuster switch (w/ driver power seat adjuster)
• Driver window switch (if equipped)
• Drv unlck pcb relay
• Electronic compass module (if equipped)
• Empty fuse
• From underhood fuse block (diagram 2 of 4)
• Front auxiliary hvac control assembly
• G302 (behind left kick panel)
• Hvac 1 fuse 5 20a
• Hvac 2 fuse 1 10a
• Hvac cntrl fuse 12 10a
• Hvac control assembly
• Hvac control assembly (w/ electric rear window defogger & power windows)
• Hvac control assembly (w/ rear window defogger, power mirrors & manual a/c)
• I/p clstr fuse 7 10a
• Ign sw pk3 mdl fuse 3 2a
• Inflatable restraint front passenger system (pps) presence sensor (light duty w/o rv upfiitter)
• Inflatable restraint sensing & diagnostic module (sdm)
• Inflatable restraint vehicle rollover sensor (w/ left & right roof side)
• Instrument panel cluster (ipc) (w/o odometer security wiring provision (seo))
• J247
• J307
• J412 (in rear hvac harness, 20 cm from auxiliary blower motor connector breakout)
• Osrvm sw fuse 18 2a
• Outside rearview mirror switch (if equipped)
• Pass/cgo unlck pcb relay
• Passenger seat adjuster switch (w/ passenger power seat adjuster)
• Passenger window switch (if equipped)
• Prk lamp relay 40
• Pwr seats circuit breaker 46 30a
• Pwr wdo circuit breaker 45 25a
• Radio
• Rap relay
• Rdo/chime fuse 8 15a
• Rear auxiliary hvac control assembly
• Rear blwr fuse 37 30a
• Rear defog relay 44 (w/ power mirror & rear window defogger)
• Remote control door lock receiver (rcdlr) (w/ low tire pressure & remote keyless entry)
• Rfa/trm fuse 11 10a
• Run relay 39
• To j203 (diagram 3 of 4)
• To rear fuse block (diagram 3 of 4)
• To upftr aux 2 relay 42 (diagram 1 of 4)
• Upfitter provisional
• Upftr aux 1 fuse 36 (w/ cutaway, ambulance & rv upfitters) 50a
• Upftr ctsy lamps pcb relay (w/ ambulance & rv upfitters)
• W/ commercial tradesman
• W/ cutaway
• W/ electric side door lock control
• W/ manual a/c, power mirrors & rear window defogger
• W/ radio
• W/ rear a/c
• W/ rear a/c & auxiliary heater
• W/ rear a/c, auxiliary heater, plumbing & wiring provision
• W/ rv upfitter
• W/ rv upfitter & 3406
• W/o radio
• W/o rv upfitter
• X222
• X321

5.3L VIN 4

5.3L VIN 4, Power Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 5.3L VIN 4, Power Distribution Wiring Diagram (1 of 4) for Chevrolet Chevy Express G2500 2008:

• (on left side of engine compt) underhood fuse block
• Abs mdl fuse 60 40a
• Abs mtr fuse 61 50a
• Aux pwr outlet fuse 33 20a
• Battery
• Bcm 1 fuse 20 10a
• Bcm 2 fuse 37 15a
• Bcm 3 fuse 26 10a
• Bcm 4 fuse 22 10a
• Bcm 5 fuse 27 10a
• Bcm 6 fuse 23 10a
• Bcm 7 fuse 25 10a
• Blower motor resistor assembly
• Body control module (bcm)
• Body fuse block (under left front seat)
• Center console 1 accessory power outlet
• Center console 2 accessory power outlet
• Cigar lighter
• Cnstr vent sol fuse 17 10a
• Data link connector (dlc)
• Ecm batt fuse 54 10a
• Electronic brake control module (ebcm)
• Engine control module (ecm)
• Evaporative emission (evap) canister vent solenoid valve
• Fcsm batt fuse 15 20a
• From cmps fuse 2 (diagram 4 of 4)
• From run relay 39 (diagram 4 of 4)
• Frt blwr fuse 66 40a
• Fuel pump flow control module (5.3l)
• Fusible link 2
• Fusible link 3
• G302 (behind left kick panel)
• G304 (behind right kick panel)
• Generator
• Instrument panel cluster (ipc) (w/ odometer security wiring provision (seo))
• J247
• J249
• Ltr/dlc fuse 38 20a
• Red
• Seo fuse 21 10a
• Starter motor
• Tcm batt fuse 44 10a
• To high beam pcb relay (diagram 2 of 4)
• Trailer connector
• Transmission control module (tcm)
• Trlr wrg fuse 35 30a
• Trlr wrg fuse 62 30a
• Upfitter provisional
• Upftr aux 2 fuse 35 50a
• Upftr aux 2 relay 42 (cutaway, ambulance & rv upfitters)
• W/ active brake control
• W/ cigar lighter
• W/ cutaway upfitter
• W/ rv upfitter
• W/ truck trailer
• W/o active brake control
• W/o cigar lighter
• X222
• X321

5.3L VIN 4, Power Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 5.3L VIN 4, Power Distribution Wiring Diagram (2 of 4) for Chevrolet Chevy Express G2500 2008:

• (in engine harness, 5 cm from x101 breakout) j120
• (in even ignition/ coil module jumper harness, on top right side of engine) j185
• (in odd ignition/coil module jumper harness, on top left side of engine) j184
• (on left side of engine compt) underhood fuse block
• 4.3l
• A/c cmprsr relay 74 (manual a/c)
• Central sequential fuel injection (central sfi) (4.3l)
• Crnk relay 73
• Drl pcb relay
• Ecm pwr/trn fuse 50 10a
• Engine control module (ecm)
• Evaporative emission (evap) canister purge solenoid valve
• Even ign inj fuse 52 (except 4.3l) 20a
• Except 4.3l
• From trlr wrg fuse a (diagram 1 of 4)
• Fuel injector
• Fuel pump relay 72
• Heated oxygen sensor (ho2s) bank 1 sensor 1
• Heated oxygen sensor (ho2s) bank 1 sensor 2
• Heated oxygen sensor (ho2s) bank 2 sensor 1
• Heated oxygen sensor (ho2s) bank 2 sensor 2
• Hi wpr relay 70
• High beam pcb relay
• Horn pcb relay
• Ignition coil
• Ignition control module (icm)
• Lo beam pcb relay
• Maf/cnstr vent fuse 49 15a
• Mass air flow (maf)/ intake air temperature (iat) sensor
• Mega fuse 77 125a
• Nca
• O2 snsr 1 fuse 46 10a
• O2 snsr 2 fuse 56 10a
• Odd ign inj fuse 55 20a
• Pnk
• Pwr/trn relay 76
• Stop lamps pcb relay (cutaway)
• To body fuse block (diagram 4 of 4)
• To run/crnk relay 69 (diagram 3 of 4)
• Trailer lh stop/turn pcb relay (w/ truck trailer)
• Trailer rh stop/turn pcb relay (w/ truck trailer)
• V6 fuel inj fuse 59 15a
• Washer pcb relay
• Wpr fuse 39 25a
• Wpr relay 7

5.3L VIN 4, Power Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 5.3L VIN 4, Power Distribution Wiring Diagram (3 of 4) for Chevrolet Chevy Express G2500 2008:

• (in chassis harness, 7 cm from ecbm breakout)
• (in prp/uf2 harness, 7 cm from breakout for rear fuse block) j312
• (in steering column harness, 30 cm from x200 connector) j205
• 4.3l
• 4.8l & 6.0l
• 5.3l
• Acc
• Air bag fuse 34 10a
• Automatic transmission
• Body control module (bcm)
• Brk sw fuse 32 10a
• Dome fluorescent work lamps fuse 2 10a
• Ecm ign fuse 48 15a
• Electronic brake control module (ebcm)
• Engine control module (ecm)
• Engine control module (edm)
• Except 4.3l
• Fluorescent work lamp relay
• From body fuse block (diagram 4 of 4)
• From mega fuse 77 (diagram 2 of 4)
• Fscm ign fuse 11 10a
• Fuel pump flow control module
• Fuel pump flow control module (5.3l)
• G102 (on left rear of engine)
• Ignition switch
• Inflatable restraint i/p module disable switch
• Inflatable restraint i/p module indicator
• Inflatable restraint sensing & diagnostic module (sdm)
• Instrument panel cluster (ipc)
• Ip clstr fuse 30 10a
• J102
• J115 (in engine harness, 15 cm from x101 breakout)
• J203 (in steering column harness, 27 cm from x200 connector)
• J302 (in prp/uf2 harness, 15 cm from rear fuse block)
• J303 (in prp/uf2 harness, 8 cm from rear fuse block)
• Key-in switch
• Left front access panel relay 5
• Left rear access panel relay 1
• Off
• Panel actuator fuse 3 45a
• Pnk
• Rear fuse block (on left "b" pillar)
• Red
• Right access panel relay 6
• Run
• Run/crnk relay 69
• Start
• Steering wheel speed/ position sensor
• Stop lamp switch
• Str/whl snsr fuse 36 (w/ active control brake) 10a
• Tcm ign fuse 47 15a
• Theft deterrent module (tdm)
• Trans fuse 51 15a
• Transmission control module (tcm)
• Underhood fuse block (on left side of engine compt)
• W/ active brake control
• W/ cargo
• W/ manual suppression
• W/ power brake
• W/o rv upfitter & manual suppression
• X175

5.3L VIN 4, Power Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G2500 2008

List of elements for 5.3L VIN 4, Power Distribution Wiring Diagram (4 of 4) for Chevrolet Chevy Express G2500 2008:

• (except rear auxiliary & rv upfitter: in front headliner harness, 15 cm from x205 breakout towards left vanity mirror lamp connector) (w/ rear auxiliary & rv upfitter: in upfitter hvac control harness, 88 cm from x303 breakout) (except rv upfitter: in front headliner harness, 52 cm from x304 breakout)
• (in rear hvac harness, 13 cm from auxiliary blower motor connector breakout) j405
• (not used)
• (under left front seat) body fuse block
• Air bag aos fuse 32 10a
• Air temperature actuator
• All drs lock pcb relay
• Auxiliary air temperature actuator
• Auxiliary blower motor high speed relay
• Auxiliary blower motor low speed relay
• Auxiliary blower motor medium speed relay
• Auxiliary hvac control module
• Auxiliary mode actuator
• Bck/up lamp pcb relay
• Body control module (bcm)
• Cgo unlck pcb relay
• Chime module
• Cmps fuse fuse 2 10a
• Driver seat adjuster switch (w/ driver power seat adjuster)
• Driver window switch (if equipped)
• Drv unlck pcb relay
• Electronic compass module (if equipped)
• Empty fuse
• From underhood fuse block (diagram 2 of 4)
• Front auxiliary hvac control assembly
• G302 (behind left kick panel)
• Hvac 1 fuse 5 20a
• Hvac 2 fuse 1 10a
• Hvac cntrl fuse 12 10a
• Hvac control assembly
• Hvac control assembly (w/ electric rear window defogger & power windows)
• Hvac control assembly (w/ rear window defogger, power mirrors & manual a/c)
• I/p clstr fuse 7 10a
• Ign sw pk3 mdl fuse 3 2a
• Inflatable restraint front passenger system (pps) presence sensor (light duty w/o rv upfiitter)
• Inflatable restraint sensing & diagnostic module (sdm)
• Inflatable restraint vehicle rollover sensor (w/ left & right roof side)
• Instrument panel cluster (ipc) (w/o odometer security wiring provision (seo))
• J247
• J307
• J412 (in rear hvac harness, 20 cm from auxiliary blower motor connector breakout)
• Osrvm sw fuse 18 2a
• Outside rearview mirror switch (if equipped)
• Pass/cgo unlck pcb relay
• Passenger seat adjuster switch (w/ passenger power seat adjuster)
• Passenger window switch (if equipped)
• Prk lamp relay 40
• Pwr seats circuit breaker 46 30a
• Pwr wdo circuit breaker 45 25a
• Radio
• Rap relay
• Rdo/chime fuse 8 15a
• Rear auxiliary hvac control assembly
• Rear blwr fuse 37 30a
• Rear defog relay 44 (w/ power mirror & rear window defogger)
• Remote control door lock receiver (rcdlr) (w/ low tire pressure & remote keyless entry)
• Rfa/trm fuse 11 10a
• Run relay 39
• To j203 (diagram 3 of 4)
• To rear fuse block (diagram 3 of 4)
• To upftr aux 2 relay 42 (diagram 1 of 4)
• Upfitter provisional
• Upftr aux 1 fuse 36 (w/ cutaway, ambulance & rv upfitters) 50a
• Upftr ctsy lamps pcb relay (w/ ambulance & rv upfitters)
• W/ commercial tradesman
• W/ cutaway
• W/ electric side door lock control
• W/ manual a/c, power mirrors & rear window defogger
• W/ radio
• W/ rear a/c
• W/ rear a/c & auxiliary heater
• W/ rear a/c, auxiliary heater, plumbing & wiring provision
• W/ rv upfitter
• W/ rv upfitter & 3406
• W/o radio
• W/o rv upfitter
• X222
• X321