Chevrolet Chevy Express G3500 (1996-2012) org/ 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) DISPLAY 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 15 ENERGIZED IPC FUSE 10 IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) 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) DISPLAY 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 15 ENERGIZED IPC FUSE 10 IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) 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

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) (AT LEFT "B" PILLAR) 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) (AT RIGHT "B" PILLAR) TAN/WHT WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

4.8L/6.0L 5.3L BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLUTCH RLY CTRL CNSTR VENT SOL FUSE 56 COMPT) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ECM PWR/TRN FUSE 78 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 79 FUEL PUMP RELAY 38 (4.8L/6.0L) GAS FUEL PUMP FUSE 24 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 64 MALFUNCTION INDICATOR LAMP MIL CTRL ODD IGN/INJ FUSE 65 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 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 49 RED/WHT WIRE SNSR 1 (PRE)/CLS FUSE 77 SNSR 2 (POST) FUSE 62 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 BLK WIRE BRN WIRE COMPUTER DATA COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE FCSM BATT FUSE 36 FSCM IGN FUSE 6 GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY 15 ENERGIZED IGN VOLT IGNITION COIL/MODULE 1 IGNITION COIL/MODULE 3 IGNITION COIL/MODULE 5 LINES SYSTEM LOW REF LT BLU WIRE LT BLU/WHT WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK PNK PNK PNK PNK PNK PNK PNK PNK 4 5 6 7 8 9 10 11 12 WIRE PNK PNK PPL 15 16 17 18 19 20 21 22 23 24 WIRE PNK WIRE PPL PPL/WHT WIRE PUMP CTRL RED WIRE RED/WHT WIRE RELAY CTRL SENS SIG SERIAL DATA SPARK PLUG TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT)

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 BRN WIRE CAMSHAFT POSITION (CMP) SENSOR (FRONT OF ENGINE) CEN FIELD SIG CKP SENS SIG LOW REF 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) GEN ON SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN INJ 1 CTRL ECT SENS SIG LOW REF INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 7 CTRL KNOCK SENSOR (KS) 1 KNOCK SENSOR (KS) 2 KS 1 SIG KS 1 SIG KS 2 SIG KS 2 SIG LOW REF LOW REF 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 TP SENS 2 SIG CMP SENS SIG TP SENS 1 SIG LOW REF PPL/WHT WIRE PRE SENS SIG SOL CTRL STARTING/ CHARGING SYSTEM 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

4.8L/6.0L 5.3L BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLUTCH RLY CTRL CNSTR VENT SOL FUSE 56 COMPT) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ECM PWR/TRN FUSE 78 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 79 FUEL PUMP RELAY 38 (4.8L/6.0L) GAS FUEL PUMP FUSE 24 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 64 MALFUNCTION INDICATOR LAMP MIL CTRL ODD IGN/INJ FUSE 65 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 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 49 RED/WHT WIRE SNSR 1 (PRE)/CLS FUSE 77 SNSR 2 (POST) FUSE 62 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 BLK WIRE BRN WIRE COMPUTER DATA COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE FCSM BATT FUSE 36 FSCM IGN FUSE 6 GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY 15 ENERGIZED IGN VOLT IGNITION COIL/MODULE 1 IGNITION COIL/MODULE 3 IGNITION COIL/MODULE 5 LINES SYSTEM LOW REF LT BLU WIRE LT BLU/WHT WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK PNK PNK PNK PNK PNK PNK PNK PNK 4 5 6 7 8 9 10 11 12 WIRE PNK PNK PPL 15 16 17 18 19 20 21 22 23 24 WIRE PNK WIRE PPL PPL/WHT WIRE PUMP CTRL RED WIRE RED/WHT WIRE RELAY CTRL SENS SIG SERIAL DATA SPARK PLUG TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT)

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 BRN WIRE CAMSHAFT POSITION (CMP) SENSOR (FRONT OF ENGINE) CEN FIELD SIG CKP SENS SIG LOW REF 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) GEN ON SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN INJ 1 CTRL ECT SENS SIG LOW REF INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 7 CTRL KNOCK SENSOR (KS) 1 KNOCK SENSOR (KS) 2 KS 1 SIG KS 1 SIG KS 2 SIG KS 2 SIG LOW REF LOW REF 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 TP SENS 2 SIG CMP SENS SIG TP SENS 1 SIG LOW REF PPL/WHT WIRE PRE SENS SIG SOL CTRL STARTING/ CHARGING SYSTEM 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

1786 5985 TRANSMISSIONS SYSTEM COMPUTER DATA LINES SYSTEM 2759 3108 2365 2931 6288 419 2927 2366 507 2366 3657 COOLING FANS SYSTEM 7493 2500 440 5991 2364 23 6141 6399 1439 COMPUTER DATA LINES SYSTEM AIR CONDITIONING SYSTEM APP SIG 1 5 VOLT REF 5 VOLT REF BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM 439 492 225 1272 COOLING FANS SYSTEM CRUISE/ETC/TCC BRK SIG CUTAWAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXHAUST TEMPERATURE SENSOR 2 EXHAUST TEMPERATURE SENSOR 3 EXHAUST TEMPERATURE SENSOR 5 GRY WIRE GRY/BLK WIRE INJ HIGH CTRL A/C CLUTCH RLY CTRL LOW REF LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MASS AIR FLOW (MAF)/INTAKE AIR TEMP (IAT) SENSOR (ATTACHED TO AIR INTAKE DUCT) NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK IGN 1 VOLT AIR FLOW SENS SIG GENERATOR TURN ON SIG LOW REF WIRE PNK PNK WIRE PNK WIRE PPL PPL PNK WIRE RED/WHT WIRE REDUCTANT PRESSURE SENSOR REDUCTANT PURGE SOLENOID VALVE STARTING/CHARGING SYSTEM STARTING/CHARGING SYSTEM 3101 6783 TAN WIRE TAN/BLK WIRE WHT WIRE WHT/ DK BLU WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE