Chevrolet Chevy Express G3500 (1996-2012) gry Wiring diagrams

27 28 2501 2500 44 43 COMPUTER DATA LINES SYSTEM DATA BUS (-) DATA BUS (+) 4.3L 4.3L/5.3L 4.8L/6.0L BATTERY BATTERY CURRENT SENSOR (4.3L/5.3L) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE CHARGE IND COMPUTER DATA LINES SYSTEM CURRENT SENSOR SIG DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L FUSIBLE LINK 3 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GMLAN SERIAL DATA GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA PNK WIRE ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE SENS SIG STARTING CIRCUIT TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE

27 28 2501 2500 44 43 COMPUTER DATA LINES SYSTEM DATA BUS (-) DATA BUS (+) 4.3L 4.3L/5.3L 4.8L/6.0L BATTERY BATTERY CURRENT SENSOR (4.3L/5.3L) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE CHARGE IND COMPUTER DATA LINES SYSTEM CURRENT SENSOR SIG DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L FUSIBLE LINK 3 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GMLAN SERIAL DATA GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA PNK WIRE ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE SENS SIG STARTING CIRCUIT TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE

1 18 25 COURTESY LP CTRL COURTESY LP CTRL DEFEAT SW SIG 149 (OR 690) 16 17 DATA BUS+ DATA BUS- 20 CM FROM RIGHT SUNSHADE BREAKOUT) 2500 2501 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) CARGO CARGO DOOR LATCH ASSEMBLY (IN RIGHT REAR CARGO DOOR) CARGO/PASSENGER COURTESY LP CTRL CTSY LP CTRL DK BLU WIRE DK BLU/WHT WIRE DOME DOME READING FL DOME RLY CTRL FRONT DOME/ READING LAMPS GRY WIRE GRY/BLK WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES LEFT SUNSHADE LIFTGATE AJAR SW SIG LOWER RIGHT "B" MIDDLE DOME/ READING LAMPS ORG/ WIRE PASSENGER PASSENGER/CARGO W/O RV UPFITTER PNK/BLK WIRE PPL PROVISIONAL READING REAR DOME/ READING LAMPS (PASSENGER) DOME LAMP (CARGO) RED WIRE RIGHT SUNSHADE (ON UPPER RIGHT OF HEADLINER) SPLICE BLOCK TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THE ENGINE BLOCK) (4.3L: RIGHT REAR OF ENGINE) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD LAMP UPFTR AUX 1 UPFTR CTSY UPFTR CTSY LAMP W/ COMMERCIAL TRADESMAN SALES PACKAGE, CARGO LAMP W/ CUTAWAY W/ CUTAWAY, CARGO W/O RV UPFITTER W/ LEFT, RIGHT SUNSHADE MIRROR W/ RV UPFITTER W/ RV UPFITTER, LEFT, RIGHT SUNSHADE MIRROR W/O RV UPFITTER W/O RV W/ RV UPFITTER UPFITTER WHT WIRE YEL/BLK WIRE

12 CM FROM LEFT FRONT DOME FLUORESCENT WORK LAMP CONNECTOR) BLK WIRE BLU WIRE DK BLU/WHT WIRE DOME FLUORESCENT WORK LAMPS DRIVER DOOR LATCH ASSEMBLY (AT REAR OF DRIVER DOOR) FRONT CARGO FLUORESCENT WORK LAMP FUSE 2 GRY WIRE GRY/BLK WIRE LEFT FRONT ACCESS PANEL FLUORESCENT WORK LAMP LEFT REAR ACCESS PANEL FLUORESCENT WORK LAMP LEFT REAR DOOR JAMB SWITCH (W/ LEFT REAR HINGED DOOR) ORG/ WIRE PACKAGE, CARGO LAMP) DOME FLUORESCENT WORK LAMPS RELAY PASSENGER DOOR LATCH ASSEMBLY (AT REAR OF FRONT PASSENGER DOOR) REAR CARGO FLUORESCENT WORK LAMP REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RIGHT ACCESS PANEL FLUORESCENT WORK LAMP RIGHT REAR DOOR JAMB SWITCH (CARGO/ PASSENGER) SPLICE BLOCK TAN/WHT WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 BATTERY B+ SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) CARGO DR UNLCK FUSE 33 CARGO DR UNLCK PCB RELAY CHIME MODULE (BEHIND LEFT CENTER OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRV DR UNLCK FUSE 36 DRVR DR UNLCK PCB RELAY FRT DR LCK FUSE 31 FRT PASS DR UNLCK FUSE 34 FRT REAR PASS DR UNLCK PCB FTR REAR DR LCK PCB GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) LEFT REAR SIDE DOOR JAM SWITCH (W/ HINGED DOOR) (AT LEFT "B" PILLAR) LIFTGATE AJAR SW SIG LO SPD GMLAN SERIAL DATA LO SPD SERIAL DATA LT BLU WIRE LT GRN WIRE ORG/BLK WIRE PNK/BLK WIRE RADIO REAR DR LCK FUSE 32 REAR OPEN SW REAR PASS DR UNLCK FUSE 35 RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (BEHIND CENTER OF DASH) RFA/TPM FUSE 21 RIGHT REAR SIDE DOOR JAM SWITCH (W/ CARGO PASSENGER) (AT RIGHT "B" PILLAR) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE W/ COMMERCIAL TRADESMAN W/ HINGED DOOR W/O COMMERCIAL TRADESMAN YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BREAKOUT) CARGO DOOR LATCH ASSEMBLY (W/ CARGO/PASSENGER) (IN RIGHT REAR CARGO DOOR) CARGO DOOR LOCK SWITCH CARGO/ PASSENGER CLASS 2 COMPUTER DATA LINES SYSTEM CUTAWAY DK BLU WIRE DK GRN WIRE DRIVER DOOR LATCH ASSEMBLY (AT REAR OF DRIVER DOOR) DRIVER DOOR LOCK SWITCH DRIVER INFORMATION CENTER (DIC) GRY WIRE GRY/BLK WIRE INSTRUMENT PANEL CLUSTER (IPC) LEFT SIDE DOOR CONTACT PLATE (AT LEFT "B" PILLAR) LOGIC LT BLU WIRE LT GRN WIRE ORG/BLK WIRE PASSENGER DOOR LATCH ASSEMBLY (AT REAR OF FRONT PASSENGER DOOR) PASSENGER DOOR LOCK SWITCH PNK/BLK WIRE RIGHT SIDE DOOR CONTACT PLATE (AT RIGHT "B" PILLAR) SECURITY INDICATOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE W/ HINGED DOOR W/ HINGED DOORS

4.8L/6.0L 5.3L BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLUTCH RLY CTRL CNSTR VENT SOL FUSE 17 COMPT) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ECM PWR/TRN FUSE 50 ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EVAP SOL CTRL EVAPORATIVE EMISSION (EVAP) CANISTER VENT SOLENOID (NEAR FRONT OF FUEL TANK) EVEN IGN/ INJ FUSE 52 FUEL PUMP RELAY 72 (4.8L/6.0L) FUEL/PUMP FUSE 2 GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES IC 1 CTRL IC 2 CTRL IC 3 CTRL IC 4 CTRL IC 5 CTRL IC 6 CTRL IC 7 CTRL IC 8 CTRL IGN INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW ENGINE OIL PRESSURE IND LOW REF LT BLU WIRE LT BLU/WHT WIRE MAF/ CNSTR VENT FUSE 49 MALFUNCTION INDICATOR LAMP MIL CTRL ODD IGN/INJ FUSE 55 ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK 5 6 7 (OR PNK) WIRE PNK PNK PNK PNK PNK PNK PNK PNK PNK 4 5 6 7 8 9 10 11 12 WIRE PNK PNK PPL PPL 15 16 17 18 19 20 21 22 23 24 WIRE PNK PPL 2 3 4 WIRE PNK WIRE PPL PPL/WHT WIRE PWR/TRN RELAY 76 RED WIRE RED/WHT WIRE SNSR 1 FUSE 46 SNSR 2 FUSE 56 TOS SIG TRANSMISSIONS SYSTEM AIR CONDITIONING SYSTEM UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE WHT WIRE YEL WIRE

& IGNITION COIL/MODULE 7) 1 2 3 PNK WIRE 1 2 3 PPL BARE BLK WIRE BLUNT CUT) BRN WIRE COMPUTER DATA DK GRN WIRE DK GRN/WHT WIRE FCSM BATT FUSE 15 FSCM IGN FUSE 11 GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY 69 ENERGIZED IGN VOLT IGNITION COIL/MODULE 1 IGNITION COIL/MODULE 3 IGNITION COIL/MODULE 5 LINES SYSTEM LOW REF LT BLU WIRE NCA WIRE ORG/ WIRE PNK PNK PNK PNK PNK PNK PNK PNK PNK 4 5 6 7 8 9 10 11 12 WIRE PNK PNK PPL PPL 15 16 17 18 19 20 21 22 23 24 WIRE PNK WIRE POWER DISTRIBUTION PPL PPL 16 17 18 PUMP CTRL RED WIRE RED/WHT WIRE RELAY CTRL SENS SIG SERIAL DATA SPARK PLUG SYSTEM TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT)

& IGNITION COIL/MODULE 8) 1 2 3 PPL BLK WIRE BRN WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE OIL PRESSURE (EOP) SENSOR (ON TOP REAR OF ENGINE) FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 3 FUEL INJECTOR 4 FUEL INJECTOR 5 FUEL INJECTOR 6 FUEL INJECTOR 7 FUEL INJECTOR 8 FUEL RAIL PRESSURE (FPR) SENSOR GRY WIRE IGNITION COIL/MODULE 2) IGNITION COIL/MODULE 4 IGNITION COIL/MODULE 6 LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/BLK WIRE PNK 5 6 WIRE PNK 7 8 9 10 11 12 13 14 WIRE PNK PNK PNK PNK PNK PNK PNK PNK PNK 4 5 6 7 8 9 10 11 12 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 16 17 18 RED WIRE SPARK PLUG TAN WIRE TAN/WHT WIRE YEL/BLK WIRE

1745 1746 844 877 2705 INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 7 CTRL 2199 469 LOW REF LOW REF 23 1174 STARTING/CHARGING SYSTEM CEN FIELD SIG OIL SW SIG LOW REF LOW REF 486 6265 485 6266 PPL TP SENS 2 SIG CMP SENS SIG TP SENS 1 SIG LOW REF 6271 6272 CKP SENS SIG LOW REF BANK 1 SENSOR 1 (IN EXHAUST PIPE, IN FRONT OF CATALYTIC CONVERTER) BANK 2 SENSOR 1 (IN EXHAUST PIPE, IN FRONT OF CATALYTIC CONVERTER) BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (AT LEFT FRONT OF ENGINE) ENGINE OIL LEVEL (EOL) SWITCH (ON RIGHT SIDE OF OIL PAN) GEN ON SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN INJ 1 CTRL ECT SENS SIG LOW REF KS 1 SIG KS 1 SIG KS 2 SIG KS 2 SIG LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAP SENS SIG PPL ORG/ WIRE ORG/BLK WIRE PNK 5 6 WIRE PNK 7 8 9 10 11 12 13 14 WIRE PNK WIRE PNK/BLK WIRE PPL PPL INTAKE SOL INJ 8 CTRL INJ 5 CTRL INJ 6 CTRL PPL/WHT WIRE PRE SENS SIG SOL CTRL STARTING/ CHARGING SYSTEM TAC MTR CTRL 2 TAC MTR CTRL 1 TAN WIRE TAN/WHT WIRE WHT GRY/ WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE