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

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID A/T ISS HI IN A/T ISS LO IN AUTO TRANSMISSION INPUT SHAFT SPEED SENSOR (INSIDE FRONT OF TRANSMISSION) AUTOMATIC TRANSMISSION BATTERY IN BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRAKE FUSE 18 BRAKE SWITCH ASSEMBLY (ON BRAKE PEDAL BRACKET) BRAKE SWITCH INPUT BRN WIRE BRN/WHT WIRE DATA CLASS II DK BLU WIRE ECM 1 FUSE ECM-B FUSE ECT SENS INPUT ENG 1 FUSE ENGINE COOLANT TEMP SENSOR (LEFT SIDE OR TOP FRONT OF ENGINE) GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HOT IN RUN, START OR OFF I/P FUSE BLOCK IGNITION IN INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL ORG/ WIRE PCM GROUND PCS SOL HI OUT PCS SOL LO OUT PNK (OR ORG) WIRE PNK WIRE PPL PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "A" RANGE SIGNAL "B" RANGE SIGNAL "C" RED WIRE RED/BLK WIRE SENSOR GROUND SENSOR RETURN TAN/WHT WIRE TCC PWM SOL TCC PWM SOLENOID THROTTLE POSITION SENSOR (MOUNTED TO SIDE OF THROTTLE BODY) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 TRANS RANGE PRESSURE SWITCH ASSEMBLY TRANS TEMP SIG IN UNDERHOOD FUSE/RELAY CENTER VEHICLE CONTROL MODULE (VCM) (ENGINE COMPT, LEFT FRONT FENDER APRON) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VSS HI VSS LO YEL WIRE YEL/BLK WIRE

A/T SHIFT LOCK SOLENOID ASHTRAY LAMP AUXILIARY BATTERY (DIESEL) AUXILIARY POWER OUTLET BATTERY BLK WIRE BLK/WHT WIRE CIGARETTE LIGHTER CONVENIENCE CENTER CONVENIENCE CENTER (LEFT SIDE OF DASH) DATA LINK CONNECTOR DAYTIME RUNNING LAMP (DRL) CONTROL MODULE HEADLAMP SWITCH I/P COMPARTMENT LAMP I/P RELAY CENTER IGNITION SWITCH W/ UPFITTER PROVISIONS ILLUMINATED ENTRY MODULE INSTRUMENT CLUSTER LEFT FRONT PARK AND TURN SIGNAL LAMP (INNER) (W/ COMPOSITE HEADLAMPS) LEFT FRONT PARK AND TURN SIGNAL LAMP (OUTER) (W/ COMPOSITE HEADLAMPS) LEFT FRONT PARK AND TURN SIGNAL LAMP (W/ SEALED BEAM HEADLAMPS) LEFT FRONT SIDE MARKER LAMP LEFT HEADLAMP (W/ SEALED BEAM HEADLAMPS) LEFT HIGH BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) LEFT LOW BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) LEFT POWER SEAT SWITCH LEFT SUN SHADE MIRROR LAMP LOW ENGINE COOLANT LEVEL INDICATOR MODULE (DIESEL) LOW ENGINE COOLANT LEVEL INDICATOR SENSOR (DIESEL) MULTI-FUNCTION ALARM MODULE NCA WIRE OF ENGINE COMPT) OR LEFT FRONT DOOR JAMB SWITCH (DIAGRAM 2 OF 3) OR RIGHT FRONT DOOR JAMB SWITCH (DIAGRAM 2 OF 3) P/B BOOSTER FLUID FLOW SWITCH POWER ANTENNA ASSEMBLY POWER DOOR LOCK CONTROL MODULE POWER DOOR LOCK RELAY RADIO REMOTE CONTROL DOOR LOCK RECEIVER SIDE DOOR JAMB SWITCH (W/ UPFITTER PROVISIONS) RIGHT FRONT RIGHT FRONT PARK AND TURN SIGNAL LAMP (INNER) (W/ COMPOSITE HEADLAMPS) RIGHT FRONT PARK AND TURN SIGNAL LAMP (OUTER) (W/ COMPOSITE HEADLAMPS) RIGHT FRONT PARK AND TURN SIGNAL LAMP (W/ SEALED BEAM HEADLAMPS) RIGHT FRONT SIDE MARKER LAMP RIGHT HEADLAMP (W/ SEALED BEAM HEADLAMPS) RIGHT HIGH BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) RIGHT LOW BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) RIGHT SUN SHADE MIRROR LAMP SEAT BELT SWITCH STEERING COLUMN GROUND TEMPERATURE VALVE ACTUATOR MOTOR HEATER AND A/C CONTROLLER TURN/ HAZARD LAMP FLASHER UPFITTER PROVISIONS RELAY W/ UPFITTER PROVISIONS W/O KEYLESS ENTRY WHT WIRE

15-77 CM FROM 6-PIN CONNECTOR ON RIGHT FRAME RAIL) 4.3L 4.3L, GVW OVER 8500 LBS., FEDERAL EMISSIONS 5.0/ 5.7L 5.0L, 5.7L, 7.4L 7.4L 7.4L ONLY 7.4L OTHERS 7.4L-ENGINE HARNESS, APPROX 14 CM FROM FUEL INJECTOR BREAKOUT) 7.4L/ 4.3L SECONDARY AIR INJECTION REACTION (AIR) PUMP CLUTCH (7.4L ONLY) A/C COMPRESSOR CLUTCH A/C LOW PRESSURE CUTOUT SWITCH FUEL PUMP AND SENDER BANK 1 SENSOR 1 BANK 1 SENSOR 3 (EX 7.4L) BANK 1 SENSOR 2 BANK 2 SENSOR 1 DIODE BANK 2 SENSOR 2 (7.4L) BASE BLK WIRE BLK/WHT WIRE BLOWER MOTOR RESISTOR/ RELAY BRAKE PRESSURE DIFFERENTIAL SWITCH CRUISE CONTROL MODULE DATA LINK CONNECTOR (DLC) ELECTRONIC BRAKE CONTROL MODULE (EBCM) EXCEPT 7.4L EXCEPT 7.4L-ENGINE HARNESS, 4-16 CM FROM FUEL INJECTOR BREAKOUT) FUEL PUMP RELAY GASOLINE ENGINES HEATED OXYGEN SENSOR HEATED OXYGEN SENSOR HEATED OXYGEN SENSOR HEATED OXYGEN SENSOR UNDERHOOD FUSE/RELAY CENTER HORNS IGNITION CONTROL MODULE (ICM) INFLATABLE RESTRAINT FRONT END DISCRIMINATING SENSOR INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE INSTRUMENT CLUSTER PASSLOCK MODULE LAMP GROUP LEFT FRONT DOOR JAMB SWITCH LEFT FRONT POWER DOOR LOCK SWITCH LEFT FRONT POWER SIDE WINDOW SWITCH LEFT POWER OUTSIDE REAR VIEW MIRROR MASS AIRFLOW (MAF) SENSOR NCA WIRE NON- BASE OTHERS OTHERS 7.4L OTHERS EXCEPT 7.4L PARK/ NEUTRAL POSITION SWITCH POWER OUTSIDE REAR VIEW MIRROR REMOTE CONTROL SWITCH RIGHT FRONT DOOR JAMB SWITCH RIGHT FRONT POWER DOOR LOCK SWITCH RIGHT FRONT POWER SIDE WINDOW SWITCH RIGHT POWER OUTSIDE REAR VIEW MIRROR STARTER RELAY TAN/WHT WIRE UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER A/C LOW PRESSURE CUTOUT SWITCH UNDERHOOD REEL LAMP UNDERHOOD LAMP VEHICLE CONTROL MODULE (VCM)

A/C COMPRESSOR CLUTCH AMBULANCE PACKAGE AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR CENTER HIGH MOUNTED STOPLAMP BLK WIRE BLK/WHT WIRE BLOWER MOTOR RESISTOR/ RELAY BRAKE PRESSURE DIFFERENTIAL SWITCH CENTER HIGH MOUNTED STOPLAMP DATA LINK CONNECTOR (DLC) DIESEL ENGINES DIODE ELECTRONIC BRAKE CONTROL MODULE (EBCM) FRONT AUXILIARY HVAC CONTROL MODULE HEATER AND A/C CONTROL LOGIC MODULE FUEL HEATER FUEL LIFT PUMP FUEL PUMP RELAY FUEL SENDER BUFFER MODULE GLOW PLUG RELAY HORNS INSTRUMENT CLUSTER LAMP GROUP LEFT REAR PARK/ STOP LAMP LEFT REAR PARK/ TURN LAMP LEFT BACKUP LAMP NCA WIRE PARK/ NEUTRAL POSITION SWITCH PASSENGER VANS ONLY PASSLOCK MODULE (BLUNT CUT) POWERTRAIN CONTROL MODULE (PCM) REAR AUXILIARY HVAC CONTROL MODULE AUXILIARY BLOWER MOTOR SWITCH RIGHT BACKUP LAMP LICENSE LAMP RIGHT POWER SEAT SWITCH RIGHT REAR DOOR JAMB SWITCH SIDE DOOR JAMB SWITCH RIGHT REAR PARK/ TURN LAMP RIGHT REAR PARK/ STOP LAMP SIDE DOOR JAMB SWITCH STARTER RELAY TAN/WHT WIRE UNDERHOOD FUSE/RELAY CENTER UNDERHOOD LAMP UNDERHOOD REEL LAMP VEHICLE SPEED SENSOR BUFFER W/ AUXILIARY HEAT ONLY W/ AUXILIARY HEAT, A/C W/ POWER PASSENGER SEAT W/O POWER PASSENGER SEAT WATER IN FUEL INDICATOR

1995 VFTC BLK WIRE BLK/WHT WIRE HEADLAMP SWITCH HI BEAM INDI- CATOR HOT AT ALL TIMES INSTRU- MENT CLUSTER LEFT LO BEAM HEAD- LAMP LO HEADLAMP DIMMER SWITCH LT GRN WIRE OFF OFF HEAD HEAD PARK PARK RIGHT HI BEAM HEAD- LAMP LEFT HI BEAM HEAD- LAMP RIGHT LO BEAM HEAD- LAMP TAN WIRE YEL WIRE

1995 VFTC BLK WIRE BLK/WHT WIRE DK BLU WIRE GRN WIRE HEADLAMP SWITCH HI BEAM INDICATOR HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT HEADLAMP HI LO HEADLAMP DIMMER SWITCH LT GRN WIRE OFF OFF HEAD HEAD PARK PARK RIGHT HEADLAMP LO HI TAN WIRE YEL WIRE

ABS IND. AIR BAG IND BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRAKE IND BRN WIRE BRN/WHT WIRE CHARGE IND CMPS FUSE 19 COMPUTER DATA LINES SYSTEM CRUISE IND DIESEL DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER (DIC) ENGINE COMPT) ENGINE CONTROLS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM ENGINE COOLANT TEMPERATURE GAUGE FRONT SEAT) FUEL GAUGE GMLAN SERIAL GRY/BLK WIRE HIGH BEAM IND HOT AT ALL TIMES HOT W/ RUN RELAY HOT W/ RUN/CRANK RELAY 15 ENERGIZED IGN VOLT IND CTRL IND LAMP (MIL) INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 10 IP CLSTR FUSE 23 LEFT TURN IND LIFTGATE AJAR SW SIG LF DOOR AJAR SW RR DOOR OPEN SW LR DOOR OPEN SW LOGIC LOW ENGINE OIL LOW ENGINE OIL PRESSURE GAUGE LOW TIRE PRESSURE IND LT BLU WIRE LT GRN WIRE MALFUNCTION MIL CTRL NETWORK 3 ODOMETER PARK BRAKE SWITCH (UNDER LEFT SIDE OF DASH) PASS SEAT BELT PNK WIRE PNK/BLK WIRE PPL PPL PNK WIRE PRESSURE IND RED/WHT WIRE RF DOOR AJAR SW RIGHT TURN IND SEAT BELT IND SECURITY IND SEO FUSE 27 SPEEDOMETER SUPPLEMENTAL RESTRAINTS SYSTEM SW SIG SWITCH SIG TAN/WHT WIRE TOW/HAUL IND TRACTION CONTROL IND UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF VOLTS GAUGE W/ ODOMETER SECURITY WIRING PROVISION (SEO) W/O ODOMETER SECURITY WIRING PROVISION (SEO) WAIT TO START IND WHT WIRE YEL WIRE YEL/BLK WIRE

1589 2759 PPL 31 16 LOW REF SENS SIG PPL 4.3L 4.8L/5.3L/6.0L 6.6L 50 41 36 35 SENS SIG BLK WIRE BLK/WHT WIRE BRAKE BOOSTER FLUID FLOW ALARM SWITCH (W/ BRAKE WARNING INDICATOR) BRAKE BOOSTER FLUID PRESSURE ALARM SWITCH (IN POWER STEERING PUMP INLET HOSE) BRAKE FLUID LEVEL SWITCH (AT LEFT REAR OF ENGINE COMPT) BRAKE PRESSURE BRN WIRE CARGO DOOR LATCH ASSEMBLY (W/ CARGO/PASSENGER) (IN RIGHT REAR CARGO DOOR) COMPUTER DATA LINES SYSTEM DIFFERENTIAL SWITCH (ON BRAKE VALVE, NEAR FRONT OF EBCM) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER DOOR LATCH ASSEMBLY (AT REAR OF DRIVER DOOR) DRIVER INFORMATION CENTER (DIC) SWITCH ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL SWITCH (ON LEFT SIDE OF OIL PAN) ENGINE OIL PRESSURE (EOP) SENSOR (EXCEPT 6.6L: ON TOP REAR OF ENGINE) EXCEPT 5.3L 5.3L FUEL LEVEL SENSOR (ON LEFT FRAME FUEL PUMP, SENDER ASSEMBLY (ON FUEL TANK) GRY WIRE GRY/BLK WIRE ILLUMI- NATION IND CTRL LEFT REAR SIDE DOOR JAMB SWITCH (W/ HINGED) (AT LEFT "B" PILLAR) LIGHT DUTY LOW REF LT BLU/BLK WIRE PASSENGER DOOR LATCH ASSEMBLY (AT REAR OF FRONT PASSENGER DOOR) PERSON- ALIZATION PNK WIRE PNK/BLK WIRE PPL PPL HEAVY DUTY PPL PNK WIRE RAIL) RIGHT REAR SIDE DOOR JAMB SWITCH (W/ CARGO/PASSENGER) (AT RIGHT "B" PILLAR) SENS SIG LOW REF SET/ RESET SWITCH SIG DATA LINK RESISTOR 44 43 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRIP/ FUEL VEHICLE INFO W/ BRAKE WARNING INDICATOR SYSTEM WATER IN-FUEL SENSOR WHT WIRE YEL WIRE YEL/BLK WIRE

195 156 LOCK OUT DOME LAMPS BATT (B+) BATT (B+) RR DOOR UNLK PASS DRS UNLK IGNITION DOME LMP OFF PROGRAM SIG BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DOOR LOCK CONTROL MODULE (ON LEFT KICK PANEL) DRIVER DOOR LOCK ACTUATOR DRIVER DR UNLK UNLOCK IN DRIVER POWER DOOR LOCK SWITCH FRONT PASSENGER DOOR LOCK ACTUATOR FRONT PASSENGER POWER DOOR LOCK SWITCH GAUGES FUSE 4 GROUND GROUND INT LTS IN LOCK SIG UNLOCK SIG PPL GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) PWR ACCY FUSE A LOCK LT BLU WIRE ORG/ WIRE PNK WIRE POWER DOOR LOCK RELAY (BEHIND CENTER OF DASH) REAR CARGO DOOR LOCK SWITCH REAR DOOR LOCK ACTUATOR REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) SIDE DOOR CONTACTOR (RIGHT "B" PILLAR) SIDE DOOR JAMB SWITCH SIDE DOOR LOCK ACTUATOR SIDE DOOR SW BATTERY (B+) TAN WIRE UNLOCK WHT WIRE WHT/BLK WIRE

1000 OHMS 2 OHMS AIR BAG INDICATOR AIR BAGS FUSE 10 BASE BLK WIRE BLK/WHT WIRE BRN WIRE DATA LINK CONNECTOR (DLC) (PARTIAL) (UNDER LEFT SIDE OF DASH) PPL DK GRN WIRE DK GRN/WHT WIRE GAUGES FUSE 4 GROUND GRY WIRE HIGH CONTROL CLASS 2 SERIAL DATA PPL HIGH CONTROL LOW CONTROL LOW CONTROL INDICATOR CONTROL HOT IN RUN, START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION INFLATABLE RESTRAINT DIAGNOSTIC RESISTOR INFLATABLE RESTRAINT I/P MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER LEFT FRONT SEAT) INFLATABLE RESTRAINT STEERING WHEEL MODULE INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSTRUMENT PANEL CLUSTER (IPC) MULTI-FUNCTION ALARM MODULE (UNDER LEFT SIDE OF DASH) NCA WIRE OVER 8500 GVW PNK WIRE PPL SEAT BELT SWITCH (OPEN WHEN BUCKLED) (AT DRIVER'S STATIONARY BELT CONNECTOR) SEAT BELT SWITCH GROUND SENSOR SIGNAL GROUND SHORTING BAR W/O PASSENGER SUPPLEMENTAL INFLATABLE RESTRAINT W/PASSENGER SUPPLEMENTAL INFLATABLE RESTRAINT WHT WIRE WHT/BLK WIRE YEL WIRE