Chevrolet Chevy Express G3500 (1996-2012) org/ Wiring diagrams

1 2 PNK IGN VOLT WIRE 149 (OR 690) AMBIENT LIGHT SENS SIG HDLP ON SIG ANTI-LOCK BRAKES SYSTEM EXTERIOR LIGHTS SYSTEM ANTI-THEFT SYSTEM INSTRUMENT CLUSTER SYSTEM BCM 7 FUSE 8 BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CHMSL CTRL CONTROL SYSTEMS COURTESY LAMP CTRL CRUISE CONTROL SYSTEM CRUISE CONTROL, SOUND SYSTEMS CRUISE CTRL SW SIG CURRENT SENS SIG LO REF IGN VOLT DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DOOR LOCKS, ANTI-THEFT SYSTEMS DOOR LOCKS, ANTI-THEFT SYSTEMS AIR CONDITIONING SYSTEM DRV DOOR LOCK SW UNLOCK SIG DRV DOOR LOCK SW LOCK SIG DRV DR LOCK RLY UNLOCK CTRL DRV DR LOCK RLY UNLOCK CTRL PASS DOOR LOCK SW LOCK CTRL GRY WIRE GRY/BLK WIRE HDLP LOW BEAM RLY CTRL PARK LAMP CTRL HDLP OFF SIG COURTESY LAMPS CTRL HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM TRANSMISSIONS SYSTEM HEADLIGHTS SYSTEM INTERIOR LIGHTS SYSTEM HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES IGN VOLT IGNITION SWITCH KEY-IN SWITCH LF DOOR OPEN SW SIG A/C REQUEST SIGNAL LF TURN SIG LAMP CTRL STOP LAMPS CTRL TCC BRAKE SIG LIFTGATE AJAR SW SIG LOW REF WIPER LOW SW SIG LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE OFF ORG/ WIRE ORG/BLK WIRE PARK LAMPS SIG PASS DOOR LOCK SW LOCK CTRL PNK 12 VOLT REF WIRE PNK IGN VOLT L TURN HAZ SW SIG R TURN HAZ SW SIG WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM PPL PPL DEFEAT SW SIG PPL HOOD CLD SW SIG PARK BRAKE SW SIG REAR ACCESS OPEN SW SIG RED/WHT WIRE RF DOOR AJAR SW SIG PASS DR LOCK SW UNLOCK CTRL LF DOOR AJAR SW SIG RR DOOR OPEN SW SIG LR DOOR OPEN SW SIG RF DOOR OPEN SW SIG RUN WIRE STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRACTION CTRL SW SIG BACKUP LAMP RLY CTRL UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WIPER SW SIG 2 FRONT WIND WIPER SW HI SIG WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM SOUND, CRUISE YEL WIRE YEL/BLK WIRE

AUXILIARY 1 FUSE 32 BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) CARGO CARGO DOOR LATCH ASSEMBLY CTSY CTSY LPS SUPPLY BATTERY DK BLU/WHT WIRE DOME DOME DEFEAT DOME HNDL DOOR OPEN SW SIG REAR DOOR AJAR CTSY LAMPS ON SIG LF DOOR SW SIG DRIVER DOOR LATCH ASSEMBLY FL WORK LMP SIG FL WORK LMP CTRL GRY/BLK WIRE HEADLAMP AND PANEL DIMMER SWITCH HNDL HOT AT ALL TIMES LEFT REAR DOOR JAMB SWITCH LT GRN WIRE NOT USED ORG/ WIRE PASSENGER DOOR LATCH ASSEMBLY POWER PPL PPL DEFEAT SW SIG REAR DOME LAMP RED WIRE RED/WHT WIRE RIGHT REAR DOOR JAMB SWITCH TAN WIRE TBC 2 FUSE 18 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ POWER DOOR LOCKS W/O POWER DOOR LOCKS YEL/BLK WIRE

12 CM FROM LEFT FRONT DOME FLUORESCENT WORK LAMP CONNECTOR) AUXILIARY 1 FUSE 32 BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) CARGO DOOR LATCH ASSEMBLY CTSY CTSY LP RELAY 26 CTSY LP/ SEO FUSE 3 CTSY LPS SUPPLY BATTERY DK BLU WIRE DK BLU/WHT WIRE DOME DOME DEFEAT DOME FLOUR- ESCENT FUSE 2 DOME FLUORESCENT WORK LAMP 1 DOME FLUORESCENT WORK LAMP 2 DOME FLUORESCENT WORK LAMP RELAY (AT LEFT "B" PILLAR) DOME HNDL DOOR OPEN SW SIG REAR DOOR AJAR CTSY LAMPS ON SIG REAR DOOR SW SIG DRIVER DOOR LATCH ASSEMBLY FL DOME LP SIG FL DOME RLY CTRL GRY/BLK WIRE HEADLAMP AND PANEL DIMMER SWITCH HNDL HOT AT ALL TIMES LEFT FRONT DOME FLUORESCENT WORK LAMP LEFT REAR DOME FLUORESCENT WORK LAMP LEFT REAR DOOR JAMB SWITCH LEFT VANITY MIRROR LAMP LT GRN WIRE NOT USED ORG/ WIRE PASSENGER DOOR LATCH ASSEMBLY POWER PPL PPL DEFEAT SW SIG PROVISIONAL REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RED/WHT WIRE RIGHT DOME FLUORESCENT WORK LAMP RIGHT REAR DOOR JAMB SWITCH RIGHT VANITY MIRROR LAMP TAN WIRE TBC 2 FUSE 18 UNDERHOOD LAMP VANITY MIRROR LAMP CONNECTOR BREAKOUT) WHT WIRE YEL/BLK WIRE

BLK WIRE GER GRID GROUND HOT AT ALL TIMES BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) HOT AT ALL TIMES UNDERHOOD FUSE BLOCK MEGA FUSE (ON LEFT SIDE OF ENGINE COMPT) HVAC/ CNTRL FUSE LEFT REAR WINDOW DEFOGGER GRID LEFT REAR WINDOW DEFOG- GER GRID LOGIC IGN NCA WIRE ORG/ WIRE OSRVM HTR FUSE PPL PPL PPL REAR DEFOG RED WIRE RIGHT (BEHIND KICK PANEL) RIGHT REAR WINDOW DEFOG- RIGHT REAR WINDOW DEFOGGER GRID RR DEFOG RLY PWR REAR WINDOW DEFOGGER IND DEFOGGER SWITCH SPLICE BLOCK SPLICE BLOCK STATIONARY REAR DOOR WINDOW SWING OUT REAR DOOR WINDOW WHT WIRE

BATTERY POSITIVE VOLTAGE BLK WIRE BLU WIRE BRN WIRE BTSI BCK/UP FUSE 36 DK BLU WIRE DK DK LT DK GRN WIRE FUSE BLOCK- UNDERHOOD (ON LEFT SIDE OF ENGINE COMPARTMENT) FUSE BLOCK- UNDERHOOD (ON LEFT SIDE OF ENGINE COMPARTMENT) RT DRL/ TURN FUSE 9 GRN WIRE GROUND HAZRD FUSE 14 HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LT BLU WIRE LT DRL/ TURN FUSE 10 LT REAR STOP/ TRN FUSE 3 TRLR STOP/ TRN FUSE 17 LT GRN WIRE MARKER LAMP (LF) MARKER LAMP (RF) ORG/ WIRE PARK/ TURN SIGNAL LAMP (LF) PARK/ TURN SIGNAL LAMP-RF PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) PNK 8 9 WIRE PNK WIRE RED WIRE RED/WHT WIRE RT REAR STOP/ TRN FUSE 4 STOP LAMP FUSE 7 STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TRAILER AUXILIARY SUPPLY VOLTAGE TRAILER BACKUP LAMPS SUPPLY VOLTAGE TRAILER PARK LAMPS SUPPLY VOLTAGE TRAILER STOP/ TURN RELAY- LEFT TRAILER STOP/ TURN RELAY- RIGHT TRAILER WIRING (BLUNT CUT) TRLR BCK/UP FUSE 5 TRLR FUSE 13 TRLR FUSE 50 WHT WIRE YEL WIRE

22 23 PNK WIRE 2755 1551 1670 1666 1551 1668 1665 1174 LOW REF GND 625 1551 START RLY CTRL GND 771 420 776 PRND A SIG STP LP SW SIG PRND P SIG PPL 772 633 410 1020 PRND B SIG CMP SIG ECT SIG IGN 0 VOLT INJ 5 CTRL INJ 8 CTRL ABS SYSTEM B+ CLASS 2 DATA BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENG 1 FUSE 23 ENG 2 FUSE 21 FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) FUSE 39 FUSE 40 GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE INJ 1 CTRL INJ 6 CTRL INJ 3 CTRL INJ 2 CTRL INJ 7 CTRL INJ 4 CTRL INJECTORS KS 1 SIGNAL KS 2 SIG CKP SIG REQ TORQ SIG UART SER DATA UART SER DATA LOW REF LOW REF GND 1551 1671 1667 1551 1669 1664 LOW REF LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE OIL LEV SW SIG ORG/ WIRE ORG/BLK WIRE PCM BATT FUSE 2 PNK 1 2 3 4 5 WIRE PNK PNK 28 29 WIRE PNK PNK 6 7 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL PPL PPL/WHT WIRE RANGE B RANGE C IGN 1 VOLT B+ LOW REF RED/WHT WIRE STARTING/ CHARGING SYSTEM TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) W/ ACTIVE BRAKE CONTROL WHT WIRE YEL WIRE YEL/BLK WIRE

13 14 PNK WIRE 15 16 17 18 19 20 21 22 PPL 22 23 PNK WIRE 5.3L W/ CA EMISSONS OTHER BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE SENSOR (AT LEFT FRONT OF ENGINE) ENGINE OIL LEVEL SWITCH (RIGHT SIDE OF OIL PAN) FUEL PUMP FUSE 12 FUEL PUMP RELAY FUEL PUMP, SENDER ASSEMBLY (ON FUEL TANK) GAS PASS/CARGO HEAVY DUTY (W/O HD TRUCK TRAILER WIRING) GRY WIRE HEATED OXYGEN SENSOR (BANK 1 SENSOR 1) (IN EXH PIPE, FRONT OF CAT CONVERTER) HEATED OXYGEN SENSOR (BANK 1 SENSOR 2) (IN EXH PIPE, BACK OF CAT CONVERTER) HEATED OXYGEN SENSOR (BANK 2 SENSOR 1) (IN EXH PIPE, FRONT OF CAT CONVERTER) HEATED OXYGEN SENSOR (BANK 2 SENSOR 2) (IN EXH PIPE, BACK OF CAT CONVERTER) HOT AT ALL TIMES KNOCK SENSOR 1 (BELOW FRONT OF INTAKE MANIFOLD) KNOCK SENSOR 2 (BELOW REAR OF INTAKE MANIFOLD) LT BLU WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE OTHER PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK 1 2 3 4 5 WIRE PNK PNK 28 29 WIRE PNK PNK 6 7 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL PPL PPL/WHT WIRE TAN WIRE TAN/WHT WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

1-2 SOL 13 14 PNK WIRE 15 16 17 18 19 20 21 22 PPL 16 17 18 19 20 21 22 23 PPL 2-3 SOL 24 25 26 PNK WIRE 3-2 SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH ACCELERATOR PEDAL POSITION SENSOR (UNDER LEFT SIDE OF DASH) APPS 1 SIG APPS 2 SIG AUTOMATIC TRANSAXLE BLK WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (TOP CENTER REAR OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) FUEL TANK PRESSURE SENSOR (ON FUEL TANK) GRY DK GRN WIRE GRY WIRE HOT IN RUN, START IGN E FUSE 22 LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN GRY WIRE LT GRN WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP REAR OF ENGINE) ORG/ WIRE ORG/BLK WIRE PC SOL VALVE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE REV SENSOR 1 SENSOR 2 STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TAN (OR BLK) WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PWM SOL TCC SOL TFT SENSOR THROTTLE ACTUATOR CONTROL MODULE (AT LEFT REAR OF ENGINE COMPT) UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

16 17 18 19 20 21 22 23 PPL 21 22 23 24 25 27 26 28 PPL 24 25 26 PNK WIRE 29 30 31 PNK WIRE AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE CAN VENT FUSE 34 CHMSL VLT CRUISE CONTROL SYSTEM CRUISE ON SW DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IGN IGN 1 VLT LOW REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK 1 2 3 4 5 6 WIRE PNK 7 8 WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/WHT WIRE RES/ACCEL SET/COAST SIDE OF TRANSMISSION) SIGNAL TAC MTR CNTL TAC MTR CNTL 1 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR 1 THROTTLE POSITION SENSOR 2 TPS 1 SIG TPS 2 SIG UART SER DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) VEHICLE SPEED SENSOR WHT WIRE YEL WIRE YEL/BLK WIRE

21 22 23 24 25 26 27 28 PPL 29 30 31 PNK WIRE 5.3L A/C REQUEST A/C SYSTEM (W/ FRONT MANUAL CONTROLS) ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRANK FUSE 27 CTRL DEL TORQ SIG PC SOL HI CTRL DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EVAP CANP CTRL EVAP VENT CTRL MIL CTRL 2-3 SS CTRL 1-2 SS CTRL VSS GEN CYCLE SIG GEN TURN ON GRY WIRE HOT IN RUN, START HOT IN START IAT SIG IC 1 CTRL IC 7 CTRL IC 6 CTRL IC 4 CTRL PPL IC 8 CTRL IC 2 CTRL IC 5 CTRL IC 3 CTRL IGN IGNITION COILS INSTRUMENT PANEL CLUSTER LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MAF SIG MAP SIG MALFUNCTION INDICATOR LAMP NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PC SOL LO CTRL PMP RLY CTRL PCM IGN 1 FUSE 38 PNK 1 2 3 4 5 6 WIRE PNK 7 8 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL FRONT LOW SIG FRONT HIGH SIG AT ISS HIGH SIG AT ISS LOW SIG PPL FUEL LEV SIG A/C LOW PRESS PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE REF LO SPARK PLUG STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL CTRL CLUT RLY CTRL TFT SENS SIG PPL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) W/ ACTIVE BRAKE CONTROL WHT WIRE YEL WIRE YEL/BLK WIRE