GMC Pickup C2500 (1985-2000) pnk Wiring diagrams

1-2 SHIFT SOL 2-3 SHIFT SOL 3-2 SHIFT SOL TRANS FLUID TEMP (TFT) SENSOR BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE ECM I FUSE ECM-B FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GAGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF DASH) PPL PPL PNK WIRE PPL/WHT WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SERVICE ENGINE SOON SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TCC/STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (RIGHT SIDE OF TBI) TRANS FUSE 20 TRANSMISSION TRANSMISSION INPUT SHAFT SPEED SENSOR (FRONT OF TRANSMISSION) UNDERHOOD FUSE/RELAY CENTER VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF DASH) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID A/T ISS SENS HI IN A/T ISS SENS IN A/T ISS SENS LO IN A/T ISS SENSOR OUT ACCELERATOR PEDAL POSITION MODULE (PART OF ACCELERATOR PEDAL) APP 1 SIGNAL IN APP 2 SIGNAL IN APP 3 SIGNAL IN AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR (LEFT FRONT OF TRANSMISSION) BATTERY IN BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRAKE FUSE 18 BRAKE SWITCH ASSEMBLY (ON BRAKE PEDAL BRACKET) BRAKE SWITCH IN BRN WIRE BRN/WHT WIRE CLASS II DATA DK BLU WIRE DK GRN WIRE ECM-B FUSE ECT SENSOR IN ENGINE COOLANT TEMP SENSOR (NEAR THERMOSTAT HOUSING) FRONT WHEEL LOCK FUEL PUMP, OIL PRESS SWITCH/ SENDER, FUEL PUMP RELAY GAUGES FUSE 4 GROUND GRY WIRE GRY/BLK WIRE HI PPL HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HOT IN RUN OR START UNDERHOOD FUSE/RELAY CENTER ECM 1 FUSE HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK IGNITION IN INSTRUMENT CLUSTER LT BLU WIRE 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 PNK WIRE PNK WIRE POWER POWERTRAIN CONTROL MODULE (RIGHT SIDE OF DASH NEAR BLOWER MOTOR) PPL PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) PPL/WHT WIRE PRESS CTRL SOLENOID LO RED WIRE RED/BLK WIRE SENSOR GROUND STOP/HAZ FUSE 1 STOPLAMP SWITCH IN TAN WIRE TAN/WHT WIRE TCC PWM SOL TCC PWM SOLENOID TFT SENSOR IN TRANS FLUID TEMP SENSOR TRANS FUSE 20 TRANS RANGE "A" TRANS RANGE "B" TRANS RANGE "C" TRANS RANGE PRESSURE SWITCH ASSEMBLY TRANS RANGE SWITCHES TRANSFER CASE CIRCUIT PNK WIRE TRANSFER CASE, AXLE SWITCHES TURN/ HAZARD SWITCH, CHIME MODULE VEHICLE SPEED SENSOR VEHICLE SPEED SENSOR (VSS) ADAPTOR VEHICLE SPEED SENSOR BUFFER (RIGHT SIDE OF DASH) VSS HI IN VSS IN VSS LO IN VSS OUT WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

ALL OTHERS BLK WIRE BRN WIRE CHARGE INDICATOR FUSIBLE LINK (10 GA-RUST) GAUGES FUSE 4 GENERATOR GENERATOR (W/ DUAL GENERATORS) HOT IN RUN OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) INSTRUMENT CLUSTER LEFT BATTERY (DIESEL) MEGA FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT, NEAR BATTERY) PNK 22 WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE RIGHT BATTERY UPLEVEL/ ENHANCED

BATTERY BATTERY LIFTGATE/CARGO REL BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DOOR LOCK RELAY FUSE BLOCK (LOWER LEFT SIDE OF I/P) GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES CIG LTR FUSE 14 HOT AT ALL TIMES PWR ACCY CIRCUIT BREAKER A HOT IN RUN, BULB TEST OR START KEYLESS ENTRY MODULE (BEHIND CENTER OF I/P) L FNT DR UNLK OUTPUT INT LTS INPUT GROUND LEFT FRONT DOOR LOCK MOTOR LEFT FRONT DOOR LOCK SWITCH LIFTGATE RELEASE MOTOR LOCK LOCK DOORS OUTPUT UNLK DOORS OUTPUT LT BLU WIRE ORG/ WIRE PNK IGNITION WIRE PNK WIRE PROGRAM ENABLE REAR CARGO DOOR LOCK MOTOR (UTILITY ONLY) RIGHT FRONT DOOR LOCK MOTOR RIGHT FRONT DOOR LOCK SWITCH TAN WIRE UNLOCK UTILITY W/ LIFTGATE WHT WIRE

BATTERY LIFTGATE RELEASE OUT BLK WIRE BLK/WHT WIRE CIG LTR FUSE 14 CONVENIENCE CENTER DATA LINK CONNECTOR DOOR LOCK RELAY UNLOCK FUSE BLOCK (LOWER LEFT SIDE OF I/P) GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES PWR ACCY CIRCUIT BREAKER A HOT IN RUN, BULB TEST OR START GAUGES FUSE 4 KEYLESS ENTRY MODULE (BEHIND CENTER OF I/P) L FNT DR UNLK OUT JAMB SWITCH INPUT GROUND LEFT FRONT DOOR LOCK MOTOR LEFT FRONT DOOR LOCK SWITCH LEFT REAR DOOR LOCK MOTOR LOCK LOCK DOORS OUT UNLK DOORS OUT LT BLU WIRE ORG/ WIRE PNK IGNITION WIRE PNK WIRE PROGRAM ENABLE INPUT RIGHT FRONT DOOR LOCK MOTOR RIGHT FRONT DOOR LOCK SWITCH RIGHT REAR DOOR LOCK MOTOR TAN WIRE TRUNK, TAILGATE, FUEL DOORS SYSTEM UNLOCK WHT WIRE

4.3L, 5.0L, 5.7L ONLY 5.7L W/ H/D A/T A/C COMP MINI FUSE A/C LOW PRESSURE CUTOUT SWITCH AUXILIARY FUEL COOLING CYCLE FAN CONTROL RELAY MODULE BRN WIRE CONVENIENCE CENTER ECM-B MINI FUSE ECM-I MINI FUSE EGR ELECTRONIC VACUUM REGULATOR SOLENOID ELECTRONIC HEATED SPARK OXYGEN CONTROL SENSOR MODULE ENG-I MINI FUSE EXCEPT 4.3L 5.7L H/D W/ M/T FROM AUX FAN FUSE FROM IGNITION SWITCH FROM MAXI FUSE 6 FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL PUMP OIL PRESSURE SWITCH/ SENDER FUEL PUMP RELAY HIGH BLOWER RELAY HORN MINI FUSE HORN RELAY I/P FUSE BLOCK IGN E MINI FUSE LOW BLOWER RELAY M/T ONLY MAXI FUSE 3 MEDIUM BLOWER RELAY ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE POWERTRAIN CONTROL MODULE (PCM) RADIO RADIO FUSE 17 REAR WIPER FUSE 23 REAR WIPER/ WASHER SWITCH RED WIRE SUBURBAN ONLY SUBURBAN, UTILITY ONLY TO POWER WINDOW CIRCUIT BREAKER UNDER HOOD FUSE-RELAY CENTER UNDERHOOD FUSE-RELAY CENTER UNDERHOOD REEL LAMP WHT WIRE WIPER FUSE 11 WIPER MOTOR MODULE WIPER/ WASHER SWITCH YEL WIRE

AIR BAG FUSE 10 ARMING SENSOR AUDIO ALARM MODULE BACKUP LAMP SWITCH BRN WIRE CONVENIENCE CENTER CREWCAB, SUBURBAN, UTILITY ONLY DAYTIME RUNNING LAMPS MODULE DAYTIME RUNNING LAMPS RELAY DIAGNOSTIC ENERGY RESERVE MODULE ELECTRO- REMOTE CHROMIC KEYLESS MIRROR ENTRY MODULE FROM IGNITION SWITCH FROM REAR WIPER FUSE GAUGES FUSE 4 HEAD- LAMP/ PANEL DIMMER SWITCH I/P FUSE BLOCK INSTRUMENT CLUSTER LEFT FRONT POWER WINDOW SWITCH M/T ONLY PNK WIRE PWR WDO CIRCUIT BRKR REAR WINDOW LOCKOUT SWITCH RIGHT FRONT POWER WINDOW SWITCH TURN B/U FUSE 16 TURN SIGNAL LAMP FLASHER VEHICLE SPEED SENSOR BUFFER MODULE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 RR+ RR- ANTENNA BARE BLK WIRE BRN WIRE CIG LTR FUSE 13 DIESEL GAS DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACC OR RUN I/P FUSE BLOCK LEFT FRONT SPEAKER LEFT FRONT TWEETER LEFT REAR DOOR SPEAKER LEFT REAR SPEAKER LR DR - RLY SIG GROUND LR DR + LR+ LR- RR DR + LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE POWER AMPLIFIER (UNDER LEFT SIDE OF DASH) POWER AMPLIFIER RELAY (UNDER LEFT SIDE OF DASH) PPL/WHT WIRE RADIO RADIO BATT FUSE 19 RADIO FUSE 17 RED WIRE REMOTE AUDIO PLAYER RIGHT FRONT SPEAKER RIGHT FRONT TWEETER RIGHT REAR DOOR SPEAKER RIGHT REAR SPEAKER RR DR - SERIAL DATA VSS SIGNAL RR - RR + LR _ LR + TAN WIRE VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPARTMENT) VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT SIDE OF DASH) VSS SIGNAL WHT WIRE YEL WIRE

BLK WIRE DK GRN/WHT WIRE HOT IN RUN OR START TURN/BU FUSE 16 I/P FUSE BLOCK LT GRN WIRE PARK/ NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK WIRE TCC/STOPLAMP SWITCH (OPEN W/ BRAKE APPLIED) (TOP OF BRAKE PEDAL) TRANSFER CASE CONTROL MODULE (UNDER DASH ON STEERING COLUMN SUPPORT BRACKET) TURN/ HAZARD SWITCH PNK WIRE W/ ELECTRIC SHIFT TRANSFER CASE

1000 OHMS AIR BAG FUSE 10 AIR BAG INDICATOR AUDIO ALARM MODULE BLK WIRE BLK/WHT WIRE BRN WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DK GRN WIRE DK GRN/WHT WIRE GAUGES FUSE 4 GRN WIRE GRY WIRE HOT IN RUN, START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) INFLATABLE RESTRAINT I/P MODULE INFLATABLE RESTRAINT IP MODULE SWITCH (PICK UP ONLY) INFLATABLE RESTRAINT STEERING WHEEL MODULE INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSTRUMENT CLUSTER OFF PNK WIRE PPL/WHT WIRE SEAT BELT SWITCH (CLOSED W/SEAT BELT UNBUCKLED) (ON DRIVER'S SEAT BELT BUCKLE) SHORTING BAR SHORTING BAR DK TAN WIRE TAN/BLK WIRE W/LUXURY PACKAGE W/LUXURY PACKAGE W/O LUXURY PACKAGE W/O LUXURY PACKAGE WHT WIRE WHT/BLK WIRE YEL WIRE