Chevrolet Chevy Express G1500 (1996-2012) serial data Wiring diagrams

1140 1037 812 1835 351 B+ SERIAL DATA BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DATA SERIAL DIESEL DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT FRAME RAIL NEAR CENTER OF VEHICLE) ENGINE CONTROL MODULE (LEFT INNER FENDER) FUSE 46 GASOLINE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR ACC HOT IN RUN OR START HOT IN RUN, ACC OR START INSTRUMENT PANEL CLUSTER LT BLU WIRE LT GRN WIRE ORG/WHT WIRE PASSLK SENS GROUND PASSLOCK SENSOR (INSIDE TOP OF STEERING COLUMN) PASSLOCK SIGNAL PNK 39 343 1020 IGN 1 VOLT ACC VOLT IGN 0 VOLT WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT INNER FENDER) PPL RED/WHT WIRE SECURITY INDICATOR SENS RET GROUND SENSOR RETURN SERIAL DATA TAN WIRE TBC ACCY (GAS) TBC/TCM ACCY (DIESEL) TBC FUSE 19 TBC IGN 0 FUSE 6 TBC IGN 1 FUSE 24 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ ACTIVE BRAKE CONTROL W/O ACTIVE BRAKE CONTROL YEL WIRE

1 2 6 8 20 21 22 23 24 40 42 47 48 51 62 63 GND TCC PWM CTRL PC SOL HI CTRL 1 8 17 18 19 20 24 27 GND AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT SIDE OF ENGINE) FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) LT GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 INSTRUMENT PANEL CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PC SOL LO CTRL PPL FRONT LOW SIG FRONT HIGH SIG PCM BATT FUSE 2 PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PRNDL INDICATOR RANGE B RANGE C IGN B+ GND GND RED/WHT WIRE SERIAL DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (ON LEFT SIDE OF THROTTLE BODY) TOW/ HAUL SWITCH TOW/HAUL INDICATOR TOW/HAUL SWITCH UNDER- HOOD FUSE BLOCK VEHICLE SPEED SENSOR WHT WIRE YEL WIRE YEL/BLK WIRE

3 2 PPL 5.0L, 5.7L GAS 4.3L, 8.1L GAS 6.5L DIESEL 8.1L ABS SERIAL DATA BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) HOT AT ALL TIMES I/P FUSE BLOCK INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER LEFT FRONT SEAT) ORG/ WIRE PASSLOCK MODULE (BELOW CENTER OF DASH) POWERTRAIN CONTROL MODULE (PCM) (BEHIND CENTER OF DASH) PPL PPL 4.3L, 6.5L DIESEL ONLY PPL 5.0L, 5.7L GAS ONLY PPL SERIAL DATA PROG SIGNAL PWR AUX FUSE 7 RADIO REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (BEHIND CENTER OF DASH) SERIAL DATA TAN/WHT WIRE

2 3 SERIAL DATA SERIAL DATA 5.3L 6.6L 4.8L, 5.3L, 6.0L 4.3L ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 5985 2501 2500 2500 2501 2500 2501 ACC WAKE-UP SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER CHIME MODULE (BEHIND LEFT CENTER OF DASH) CONTROL EXCEPT 6.6L W/O ACTIVE BRAKE CONTROL COOLANT HEATER (6.6L) DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DATA LINK RESISTOR DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) ELECTRONIC CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 5.3L EXCEPT 6.6L W/ ACTIVE BRAKE FUEL PUMP FLOW CONTROL MODULE (5.3L) (AT REAR OF GLOW PLUG CONTROL MODULE (GPCM) (6.6L) HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY W/O RECREATIONAL VEHICLE, UPFITTER SALES PACKAGE LTR/DLC FUSE 38 RADIO RED WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (IF EQUIPPED) (BEHIND CENTER OF DASH) SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD PASS THROUGH GROMMET) VEHICLE, ATTACHED TO LEFT REAR FRAME RAIL) W/ AUXILIARY FUEL FIRED HEATER W/ RADIO PROVISIONS W/O AUXILIARY FUEL FIRED HEATER W/O RADIO PROVISIONS WHT WIRE

BLK WIRE BLU WIRE BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) CARGO/ PASSENGER CLASS 2 CRUISE IND CLASS 2 (PCM) DATA COMPUTER DATA LINES SYSTEM CRUISE CONTROL MODULE (NEAR BRAKE FLUID RESERVOIR) CUTAWAY DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN, START IGN IGN E FUSE 22 INSTRUMENT PANEL CLUSTER LT BLU WIRE LT BLU/BLK WIRE NCA WIRE ON CRUISE CONTROL ON/OFF SWITCH OFF ON OFF PCM IGN 1 FUSE 38 PNK 17 (OR 1320) WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL VSS LOW RED/WHT WIRE RESUME/ ACCEL RESUME/ACCEL SERIAL DATA SET/ COAST SPEED SIGNAL AUTO CRUISE INHIBIT SIG VSS HIGH 13 37 STOP LP FUSE 7 STOP/ CHMSL FUSE 8 STOPLAMP SWITCH (ABOVE BRAKE PEDAL) TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON RIGHT SIDE OF TRANSMISSION) WHT (OR LT BLU) WIRE WHT WIRE YEL WIRE

12 8 17 11 SWITCH ON SIG PARK LAMPS SIG SWITCH OFF SIG AMBIENT SENS SIG 25 18 HEADLAMP SW SIG HEADLAMP LO SIG AMBIENT LIGHT SENSOR (ON TOP OF INSTRUMENT PANEL) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE DRL 1 FUSE 67 DRL 2 FUSE 66 DRL PCB RELAY FTP FUSIBLE LINK 2 HEAD HEAD 1 8 HEADLAMP, PANEL DIMMER SWITCH HIGH BEAM IND HIGH BEAM PCB RELAY HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY 15 ENERGIZED IGN IPC FUSE 10 LEFT HIGH BEAM HEADLAMP LEFT HEADLAMP LEFT LOW BEAM HEADLAMP LO BEAM RLY CTRL LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW BEAM PCB RELAY LT BLU WIRE LT GRN/BLK WIRE LT LO BEAM FUSE 53 OFF AUTO PARK PARK BRAKE SWITCH (UNDER LEFT SIDE OF DASH) PARK BRK SW SIG PNK WIRE PNK/WHT WIRE PPL PPL 23 16 LO BEAM CTRL HI BEAM RLY CTRL RED WIRE RIGHT HEADLAMP RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP RT HI BEAM FUSE 52 RT LO LT HI BEAM BEAM FUSE 54 FUSE 51 SERIAL DATA SYSTEM TAN/WHT WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CHROME GRILLE W/ CHROME W/O CHROME GRILLE GRILLE W/O CHROME GRILLE WHT WIRE YEL WIRE

23 3 SERIAL DATA BELT SW 7 63 5 VOLT REF LOW REF ABS IND. AIR BAG IND BATTERY IND BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER RIGHT SIDE OF DASH) BRAKE IND BRAKE WARNING IND CONTROL BATT VOLTAGE GROUND GROUND IGN VOLTAGE SERIAL DATA BRN WIRE BRN/WHT WIRE CHECK GAGES IND. CLASS 2 (BCM) CLASS 2 (EBCM) CLASS 2 (PCM) CLASS 2 (SDM) COMPUTER DATA LINES SYSTEM CRUISE IND DIMMING DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRL IND ECT SENS ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMP ENGINE COOLANT TEMPERATURE SENSOR (LEFT SIDE OF ENGINE) ENGINE OIL LEVEL SWITCH (4.8L, 5.3L, 6.0L) (RIGHT SIDE OF OIL PAN) ENGINE OIL PRESSURE SENSOR (TOP REAR OF ENGINE) FUEL GAUGE FUEL PUMP/ SENDER ASSEMBLY (IN FUEL TANK) GROUND GRY WIRE HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START IGN IGN CLASS 2 (PCM) IGN CLASS 2 (PCM) IGN CLASS 2 (PCM) IGN CLASS 2 (PCM) IGN VOLT SIG IGN E FUSE 22 ILLUMINATION (6 BULBS) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER IPC FUSE 31 LCD DISPLAY 000000 TRIP LEFT FRONT SEAT BELT SWITCH (IN LEFT FRONT SEAT BELT LATCH) LEFT TURN IND LH FRT TURN SIG SUP VOLT LOW REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION IND LAMP MIL CTRL MIL SIGNAL OFF OIL PRESS OIL PRESS (RIGHT REAR OF ENGINE) OIL PRESSURE OIL PRESSURE IND P R N D 3 2 1 PARK BRAKE PARK BRAKE SWITCH (UNDER LEFT SIDE OF DASH) PNK WIRE POWER BRAKE BOOSTER FLUID PRESSURE ALARM SWITCH (IN BOOSTER INLET HOSE) POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL FUEL LEVEL RED/WHT WIRE RH FRT TURN SIG SUP VOLT RIGHT TURN IND SEAT BELT IND SECURITY IND SERIAL DATA SPEEDOMETER SPLICE PACK TAN WIRE TAN/WHT WIRE TOW/HAUL IND TRACTION CONTROL IND'S TRIP RESET SWITCH TRIP RESET SWN SIGNAL GROUND UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, ATTACHED TO LEFT FRONT FENDER) VOLTMETER W/ PWR SEAT W/O PWR SEAT YEL WIRE

1 2 3 4 BATTERY B+ SERIAL DATA PNK WIRE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) CARGO DOOR LATCH ASSEMBLY CARGO UNLK FUSE 5 CARGO UNLK RELAY 27 DK BLU WIRE DOOR LKS FUSE 15 DOOR LKS RELAY 30 DOOR LOCK CTRL UNLOCK CTRL DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR LOCK SWITCH DRV LKS FUSE 7 DRV UNLK RELAY 28 FRONT PASSENGER DOOR LATCH ASSEMBLY FRONT PASSENGER DOOR LOCK SWITCH GROUND GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER LEFT REAR SIDE DOOR LOCK ACTUATOR LEFT SIDE DOOR CONTACT PLATE (LEFT "B" PILLAR) LT BLU WIRE LT GRN WIRE PASS UNLK RELAY 31 REAR CARGO DOOR LOCK SWITCH RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) RIGHT REAR SIDE DOOR LOCK ACTUATOR RIGHT SIDE DOOR CONTACT PLATE (RIGHT "B" PILLAR) SERIAL DATA SERIAL DATA UNLOCK RLY CTRL SW UNLOCK CTRL SW LOCK CTRL RELEASE RLY CTRL SPLICE SPLICE PACK TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) RFA FUSE 20 WHT WIRE

AMP VOLTAGE AMPLIFIER 2 (ABOVE RIGHT INTERIOR PANEL ABOVE REAR WHEELHOUSE) BARE BATTERY BLK WIRE BOSE BOSE AMPLIFIER FUSE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRAIN FROM THE POWER WINDOW SWITCH BREAKOUT) GROUND HOT AT ALL TIMES L MID HL SPKR (-) LEFT MID HEADLINER SPEAKER LEFT REAR HEADLINER SPEAKER LF SPEAKER (+) LR HL SPEAKER (-) LR LO AUD SIG - LT BLU/BLK WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PPL 6 7 PPL 7 8 R MID HL SPKR (+) REAR FUSE BLOCK (REAR OF DRIVER DOOR, BEHIND LEFT INTERIOR PANEL) REAR SUBWFR (-) REAR SUWFR (+) RED WIRE RED/WHT WIRE RIGHT FRONT DOOR SPEAKER RIGHT MID HEADLINER SPEAKER RIGHT REAR HEADLINER SPEAKER RR HL SPKR (-) RR LO AUD SID (-) RR LO AUD SIG + RSA-T MODULE (BEHIND LEFT INTERIOR PANEL REAR OF DRIVER DOOR) SERIAL DATA TAN WIRE TAN/BLK WIRE VCP AUD LEFT (+) VCP AUD RIGHT (+) VCP SIG (-) VCP/DVD POWER VCP/DVD PWR VIDEO CASSETTE PLAYER (VCP) VIDEO SIG WHT WIRE WINDOW MOTOR BREAKOUT) YEL/BLK WIRE

1 14 5 SERIAL DATA BRAKE WARN IND CTRL PASSENGER SEAT BELT IND 19 15 16 ALARM ENABLE SIG HAZARD SW LEFT SIG HAZARD SW RIGHT SIG 2 59 28 60 SERIAL DATA LH SEAT BELT SW LOW REF RH SEAT BELT SW 8 17 PARK LAMP SIGNAL HEADLAMP SW OFF SIG AIR BAG FUSE 28 AUTO OFF 3 8 BATTERY BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) CHIME MODULE (W/O RADIO) (BEHIND LEFT CENTER OF DASH) CONNECTOR BREAKOUT) DATA LINK CONNECTOR (DLC) DK BLU/WHT WIRE DK GRN WIRE DRIVER DOOR LATCH ASSEMBLY (AT REAR OF DRIVER DOOR) DRIVER INFORMATION CENTER (DIC) DISPLAY DRIVER SEAT BELT BUCKLE DRIVER SEAT BELT SWITCH FUSE 22 GROUND GRY WIRE GRY/BLK WIRE HAZARD SWITCH HEAD PARK HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES IGN SW IGNITION KEY SWITCH IGNITION SWITCH PNK WIRE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR JAMB SWITCH (W/ LEFT REAR HINGED DOOR) (AT LEFT "B" PILLAR) LEFT TURN LOGIC LT BLU WIRE LT BLU/BLK WIRE OFF ORG/ WIRE PARK BRAKE SWITCH (UNDER LEFT SIDE OF DASH) PARK BRK SW SIG PASSENGER AIR BAG IND PASSENGER DOOR LATCH ASSEMBLY (AT REAR OF FRONT PASSENGER DOOR) PASSENGER SEAT BELT BUCKLE (W/O MANUAL SUPPRESSION SWITCH, RV UPFITTER) PASSENGER SEAT BELT IND PASSENGER SEAT BELT SWITCH PNK IGN VOLT WIRE PNK PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE PPL RADIO RDO/CHIME FUSE 20 RED WIRE RED/WHT WIRE RIGHT REAR DOOR JAMB SWITCH (CARGO/ PASSENGER) (AT RIGHT "B" PILLAR) RIGHT TURN RUN WIRE SEAT BELT IND LOW OIL PRESSURE IND TIRE PRESSURE IND SERIAL DATA SPLICE BLOCK SUPPLEMENTAL RESTRAINTS SYSTEM TAN WIRE TAN/WHT WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH W/ ELECTRIC SIDE DOOR LOCK CONTROL W/ MANUAL SUPPRESSION SWITCH W/O MANUAL SUPPRESSION SWITCH, RV UPFITTER W/O RADIO WHT WIRE YEL WIRE YEL/BLK WIRE