POWER DISTRIBUTION – Chevrolet Chevy Express G2500 2004 – SYSTEM WIRING DIAGRAMS

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 6) for Chevrolet Chevy Express G2500 2004

List of elements for Power Distribution Wiring Diagram (1 of 6) for Chevrolet Chevy Express G2500 2004:

• (not used)
• (or red)
• (rfa fuse 20) (diagram 1 of 6)
• (w/ active handling)
• (w/o active handling)
• A10
• A12
• Abs fuse 48 60a
• Aux pwr fuse 29 20a
• Auxiliary power outlet 1
• Auxiliary power outlet 2
• B10
• Battery
• Blow fuse 51 40a
• Blower motor resistor assembly
• Body control module (bcm)
• Body fuse block
• C2 a10
• C2 b5
• C2 b7
• C2 f12
• C3 a5
• C6 b
• C7 a
• C8 a
• Chime (w/o radio)
• Cigar fuse 30 15a
• Cigar lighter
• D10
• Data link connector (dlc)
• Driver seat adjuster switch (if equipped)
• E10
• E12
• Electronic brake control module (ebcm)
• F10
• F12
• Flasher fuse 14 15a
• From underhood fuse block b
• Front passenger seat adjuster switch (if equipped)
• Fusible link b
• Fusible link c
• G304 (behind right kick panel)
• Generator
• Hvac control assembly
• Instrument panel cluster (ipc)
• Ipc fuse 31 10a
• Left trailer stop/turn relay (if equipped)
• Mega fuse 65 125a
• Pcm bat fuse 2 20a
• Powertrain control module (pcm)
• Pwr seat circuit breaker 60 30a
• Radio (w/ radio)
• Radio bat fuse 1 15a
• Red
• Remote control door lock receiver (if equipped)
• Rfa fuse 20 10a
• Right trailer stop/turn relay (if equipped)
• Rr def/htd mir fuse 8 20a
• S249
• Spare fuse 64
• Starter
• Stop lamp switch
• Stop lp fuse 7 15a
• Tbc 2 fuse 18 15a
• Tbc 3 fuse 16 15a
• Tbc 4 fuse 11 15a
• Tbc fuse 19 10a
• To body fuse block (door lks fuse 15) (diagram 2 of 6)
• To underhood fuse block (can vent fuse 34) (diagram 2 of 6)
• To underhood fuse block (tbc fuse 19) (diagram 1 of 6)
• Trl stop/trn fuse 17 15a
• Trlr fuse 13 30a
• Trlr fuse 50 30a
• Turn signal/ hazard flasher module
• Underhood fuse block (on left side of engine compt)
• Vehicle communication interface module (vcim) (if equipped)
• W/ cigar lighter
• W/ rear window defogger/ heated mirrors
• W/o cigar lighter

Power Distribution Wiring Diagram (2 of 6) for Chevrolet Chevy Express G2500 2004

List of elements for Power Distribution Wiring Diagram (2 of 6) for Chevrolet Chevy Express G2500 2004:

• (hdlp hibm relay) (diagram 2 of 6)
• (on left side of engine compt) underhood fuse block
• (pwr seat circuit breaker 60) (diagram 1 of 6)
• (under left front seat) body fuse block
• A/c fuse 32 10a
• A/c relay
• Auxiliary 2 fuse 33 50a
• Auxiliary relay
• C1 e6
• C4 r
• C5 a
• Can vent fuse 34 10a
• Cargo lks fuse 5 10a
• Cargo unlk relay
• Composite
• Door lks fuse 15 20a
• Door lks relay
• Drv lks fuse 7 10a
• Drv unlk relay
• Evaporative emissions (evap) canister vent solenoid
• From underhood fuse block (mega fuse 65) (diagram 1 of 6)
• From underhood fuse block c
• From underhood fuse block d
• Fuel pump fuse 12 20a
• Fuel pump relay
• Hdlp hibm relay
• Hdlp lobm relay
• Horn fuse 15 15a
• Horn relay
• Htd mir/defog fuse 12 30a
• Ign a fuse 49 40a
• Ign b fuse 52 40a
• Left headlamp
• Left hibm fuse 44 10a
• Left high beam headlamp
• Left lobm fuse 43 10a
• Left low beam headlamp
• Pass unlk relay
• Right headlamp
• Right hibm fuse 45 10a
• Right high beam headlamp
• Right lobm fuse 42 10a
• Right low beam headlamp
• Rr defog relay
• Sealed
• Spare fuse 33 10a
• Spare relay
• Starter relay
• To body fuse block (park lp relay) (diagram 3 of 6)
• To ignition switch (diagram 3 of 6)
• To underhood fuse block (ign a fuse 49) (diagram 2 of 6)
• Wpr fuse 41 15a
• Wpr relay

Power Distribution Wiring Diagram (3 of 6) for Chevrolet Chevy Express G2500 2004

List of elements for Power Distribution Wiring Diagram (3 of 6) for Chevrolet Chevy Express G2500 2004:

• (auxiliary 2 fuse 33) (diagram 2 of 6)
• (not used)
• (on left side of engine compt) underhood fuse block
• (provisional) (rv/upfitter)
• (under left front seat) body fuse block
• (w/ active handling)
• (w/o active handling)
• Acc
• Body control module (bcm)
• Btsi fuse 28 10a
• Btsi/bu fuse 36 15a
• C320
• C405
• Cruise control module (if equipped)
• Ctsy lp relay (rv/upfitter)
• Ctsy lp/seo fuse 3 15a
• Cutaway
• F11
• Fr prk fuse 22 10a
• From body fuse block g
• From underhood fuse block (ign a fuse 49) (diagram 2 of 6)
• From underhood fuse block (ign b, fuse 52) (diagram 2 of 6)
• 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
• Ignition switch
• Inflatable restraint i/p module disable switch (heavy duty)
• Inflatable restraint sensing & diagnostic module
• Inside rearview mirror (w/ temp display)
• Isrv fuse 26 10a
• Left front marker lamp
• Left front park/turn signal lamp
• Left tail/stop & turn signal lamp
• Left taillamp assembly
• License lamp
• Lock
• Lr prk fuse 18 10a
• Nca
• O2a fuse 40 15a
• O2b fuse 39 15a
• Off
• Park acc
• Park lp relay
• Park/ neutral position (pnp) switch
• Pcm ign 1 fuse 38 15a
• Pnk
• Pnk f
• Powertrain control module (pcm)
• Reverse
• Right front marker lamp
• Right front park/turn signal lamp
• Right tail/stop & turn signal lamp
• Right taillamp assembly
• Rr prk fuse 20 10a
• Run
• Sir fuse 37 10a
• Spare fuse 25
• Spare fuse 35
• Start
• Steering wheel speed/ position sensor
• Stop lamp switch
• Tbc ign 1 fuse 24 10a
• Throttle control actuator module
• To body fuse block (auxiliary 1 fuse 32) (diagram 5 of 6)
• To body fuse block (brks fuse 11) (diagram 5 of 6)
• To underhood fuse block (crank fuse 27) (diagram 4 of 6)
• To underhood fuse block (eng 2 fuse 21) (diagram 4 of 6)
• To underhood fuse block (ign o fuse 6) (diagram 4 of 6)
• To underhood fuse block (tbc acc fuse 46) (diagram 4 of 6)
• Trailer wiring
• Trlr bu fuse 5 10a
• Trlr prk fuse 21 15a
• Underhood fuse block
• Upftr prk fuse 16 10a

Power Distribution Wiring Diagram (4 of 6) for Chevrolet Chevy Express G2500 2004

List of elements for Power Distribution Wiring Diagram (4 of 6) for Chevrolet Chevy Express G2500 2004:

• (4.3l)
• (4.8l/5.3l/ 6.0l)
• (except 4.3l)
• (not used)
• (on left side of eng compt) underhood fuse block
• A/c relay
• A11
• Automatic transmission
• B10
• Body control module (bcm)
• C10
• C12
• C175
• Crank fuse 27 10a
• Cruise control on/off switch
• D10
• E10
• E12
• Eng 1 fuse 23 15a
• Eng 2 fuse 21 10a
• Evaporative emissions (evap) canister purge solenoid
• Fr wpr fuse 47 25a
• From ignition switch (diagram 3 of 6)
• From underhood fuse block (sir fuse 37) (diagram 3 of 6)
• Fuel injector
• Fuel injector (except 4.3l)
• Ign 0 fuse 6 10a
• Ign e fuse 22 10a
• Ignition coil
• Ignition coil module
• Instrument panel cluster
• Mass air flow (maf) sensor
• Park/ neutral position (pnp) switch
• Pnk
• Pnk pnk
• Powertrain control module (pcm)
• S184 (in odd ignition coil module jumper harness, on top left side of engine)
• S185 (in even ignition coil module jumper harness, on top right side of engine)
• Stop lamp switch
• Tbc acc fuse 46 10a
• Turn signal switch
• Turn signal/ multifunction switch
• Windshield wiper motor

Power Distribution Wiring Diagram (5 of 6) for Chevrolet Chevy Express G2500 2004

List of elements for Power Distribution Wiring Diagram (5 of 6) for Chevrolet Chevy Express G2500 2004:

• (in front headliner (in upfitter hvac control harness, approx 88 cm from c303 breakout) s307
• (in rear hvac harness, approx 13 cm from auxiliary blower motor connector breakout) s405
• (not used)
• (or red)
• (provisional)
• (provisional) (rv/upfitter)
• (w/ outside heated mirrors & rear window defogger)
• (w/ rv upfitter option)
• (w/o rv upfitter option)
• Air temperature actuator
• Auxiliary 1 fuse 32 50a
• Auxiliary air temperature actuator
• Auxiliary high speed blower motor relay
• Auxiliary hvac control processor
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• Auxiliary mode actuator
• Auxiliary relay
• B10
• Body fuse block
• Brks fuse 11 10a
• C222
• C407
• Driver window switch (if equipped)
• E11
• Electronic brake control module (ebcm)
• F10
• F11
• From body fuse block (ctsy lp/seo fuse 3) (diagram 3 of 6)
• From ignition switch (diagram 3 of 6)
• Front auxiliary hvac control assembly
• Front passenger window switch (if equipped)
• Harness, approx 52 cm from c304 breakout) s307
• Hvac 1 fuse 9 10a
• Hvac control assembly
• Hvac fuse 10 20a
• Not available fuse 1
• Osrvm fuse 2 10a
• Outside rearview mirror switch (if equipped)
• Pwr wnd circuit breaker 34 25a
• Rear auxiliary hvac control assembly
• Rr blower fuse 13 30a
• To s302 (diagram 6 of 6)
• To s412 (diagram 6 of 6)
• Traction control switch
• Underhood fuse block
• W/ active handling
• W/ auxiliary hvac
• W/ rear auxiliary control
• W/ rear auxiliary hvac
• W/o active handling
• W/o rear auxiliary control
• Wnd rap relay

Power Distribution Wiring Diagram (6 of 6) for Chevrolet Chevy Express G2500 2004

List of elements for Power Distribution Wiring Diagram (6 of 6) for Chevrolet Chevy Express G2500 2004:

• (in prp/uf2 harness, approx 8 cm from rear fuse block) s303
• (in rear hvac harness, approx 20 cm from auxiliary blower motor connector breakout) s412
• (or red)
• (provisional)
• Auxiliary high speed blower motor relay
• Auxiliary low speed blower motor relay
• Auxiliary med speed blower motor relay
• C321
• C409
• Dome fluorescent work lamp relay
• Dome fluorescent work lamps fuse 2 10a
• From body fuse block (auxiliary 1 fuse 32) (diagram 5 of 6)
• From body fuse block (rr blower fuse 13) (diagram 5 of 6)
• Left side front access panel relay 5
• Left side rear access panel relay 1
• Panel actuator fuse 3 15a
• Rear fuse block (on left "b" pillar)
• Red
• Red (in prp/uf2 harness, approx 15 cm from rear fuse block) s302
• Right side access panel relay 6
• W/ auxiliary hvac
• W/ commercial option
• W/o auxiliary hvac
• W/o commercial option