GMC Pickup C2500 (1985-2000) dk grn Wiring diagrams

ANTENNA ANTENNA INPUT BLK WIRE BRN WIRE COAXIAL CABLE CTSY FUSE DK GRN WIRE FUSE BLOCK (UNDER LEFT SIDE OF DASH) GRY WIRE HOT AT ALL TIMES HOT IN ACCY OR RUN IGN MEMORY(BAT) LEFT FRONT SPEAKER LT FRT SPKR LT FRT SPKR RT FRT SPKR RT FRT SPKR GROUND PARK LAMP DIMMER LT GRN WIRE ORG/ WIRE RADIO RADIO FUSE RIGHT FRONT SPEAKER TAN WIRE YEL WIRE

1 2 3 4 RF (+) RF (-) LF (+) LF (-) 17 18 19 20 RR (-) RR (+) LR (-) LR (+) 5 6 7 8 9 10 GROUND PARK LAMP DIMMER ANTENNA OUT IGNITION MEMORY ANTENNA BLK WIRE BLU WIRE BRN WIRE CASSETTE DECK CTSY FUSE DK BLU WIRE DK GRN WIRE FUSE BLOCK (UNDER LEFT SIDE OF DASH) GRAPHIC EQUALIZER GROUND PARK LAMP DIMMER IGNITION MEM (DATA) DATA GRY WIRE HOT AT ALL TIMES HOT IN ACCY OR RUN LEFT FRONT SPEAKER LEFT REAR SPEAKER LT BLU WIRE LT GRN WIRE ORG/ WIRE ORG/WHT WIRE PNK WIRE POWER ANTENNA SYSTEM PPL RADIO CONTROL HEAD RADIO FUSE RADIO RECEIVER RED WIRE RED/WHT WIRE RIGHT FRONT SPEAKER RIGHT REAR SPEAKER TAN WIRE WHT WIRE YEL WIRE

1 2 3 4 RF (+) RF (-) LF (+) LF (-) 17 18 19 20 RR (-) RR (+) LR (-) LR (+) 5 6 7 8 9 10 GROUND PARK LAMP DIMMER ANTENNA OUT IGNITION MEMORY ANTENNA BLK WIRE BLU WIRE BRN WIRE CASSETTE DECK CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) CTSY FUSE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUSE BLOCK (UNDER LEFT SIDE OF DASH) GRAPHIC EQUALIZER GROUND PARK LAMP DIMMER IGNITION MEM (DATA) DATA GRY WIRE HOT AT ALL TIMES HOT IN ACCY OR RUN INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM LEFT FRONT SPEAKER LEFT REAR SIDE DOOR SPEAKER LEFT REAR SPEAKER LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE LT RR DOOR SPKR AMPLIFIER RELAY GROUND LT RR DOOR SPKR NOT USED LT RR SPKR LT RR SPKR RT RR DOOR SPKR NOT USED NOT USED ORG/ WIRE ORG/WHT WIRE PNK WIRE POWER AMPLIFIER RELAY (UNDER DASH, LEFT OF PEDAL BRACKET) PPL RADIO CONTROL HEAD RADIO FUSE RADIO POWER AMPLIFIER (UNDER DRIVER'S SEAT) RADIO RECEIVER RED WIRE RED/WHT WIRE RIGHT FRONT SPEAKER RIGHT REAR SIDE DOOR SPEAKER RIGHT REAR SPEAKER RT RR DOOR SPKR NOT USED NOT USED RT RR SPKR RT RR SPKR TAN WIRE WHT WIRE YEL WIRE

A/T ACCY AIR BAG ANTI-LOCK BRAKES ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRAKE PRESSURE WARNING SWITCH (ON REAR OF BRAKE PRESSURE MODULATOR VALVE BODY) BRAKE/ BRN WIRE BRN/WHT WIRE BULB TEST CHECK GAUGES CHECK GAUGES LAMP DRIVER CONVENIENCE CENTER (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC PRNDL DISPLAY MODULE ENG-I MINI FUSE ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM SOUND SYSTEMS ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENDER (FRONT OF LEFT CYLINDER HEAD) FUEL GAUGE FUEL PUMP, SENDER (IN FUEL TANK) GAUGES FUSE 4 GEN WAIT TO GRY WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM (DRL) HI BEAM HOT IN RUN OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGNITION SWITCH ILLUM INSTRUMENT CLUSTER LEFT TURN LOCK OFF W/ DRL ONLY LOW COOLANT LOW COOLANT LEVEL SENDER (IN COOLANT RESERVOIR) LOW ENGINE COOLANT LEVEL INDICATOR MODULE (UNDER CENTER OF I/P) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T PNK WIRE NCA WIRE OIL PRESS OIL PRESSURE SWITCH/SENDER (LEFT REAR TOP OF ENGINE) PARK BRAKE WARNING SWITCH (LEFT END OF I/P) PNK WIRE PPL PPL/WHT WIRE RIGHT TURN RUN WIRE SAFETY BELT SERVICE ENGINE SOON SERVICE THROTTLE SOON UP- SHIFT SPEED- OMETER STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACH VOLT- METER TAN WIRE TAN/ WHT WIRE TAN/BLK WIRE TAN/WHT WIRE TEMP GAUGE TRANS FUSE 20 TRANSMISSSION RANGE SELECTOR TRUNK, TAILGATE, FUEL DOORS SYSTEM TRUNK/TAIL- GATE/FUEL DOORS SYSTEM UNDERHOOD FUSE/RELAY CENTER (LEFT REAR OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT END OF I/P) W/O DRL ONLY WARNING SYSTEMS WATER IN FUEL WATER-IN FUEL SENSOR (TOP REAR OF ENGINE) WHT TAN/ WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

A/T ACCY AIR BAG DAYTIME RUNNING LAMPS ANTI-LOCK BRAKES ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BRAKE PRESSURE WARNING SWITCH (ON REAR OF BRAKE PRESSURE MODULATOR VALVE BODY) BRAKE/ BRN WIRE BRN/WHT WIRE BULB TEST CHECK GAUGES CHECK GAUGES LAMP DRIVER CONVENIENCE CENTER (BEHIND LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC PRNDL DISPLAY MODULE ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM SOUND SYSTEMS ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENDER (FRONT OF LEFT CYLINDER HEAD) FUEL GAUGE FUEL PUMP OIL PRESSURE SWITCH/SENDER (TOP REAR OF ENGINE) FUEL PUMP, SENDER (IN FUEL TANK) GAUGES FUSE 4 GEN GRY WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM (DRL) HI BEAM HOT IN RUN OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGNITION SWITCH ILLUM INSTRUMENT CLUSTER LEFT TURN LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T PNK WIRE NCA WIRE OIL PRESS PARK BRAKE WARNING SWITCH (LEFT END OF I/P) PNK WIRE PPL PPL/WHT WIRE RIGHT TURN RUN WIRE SAFETY BELT SERVICE ENGINE SOON SPEED- OMETER STARTING/CHARGING SYSTEM SYSTEM SUPPLEMENTAL RESTRAINTS TACH VOLT- METER TAN WIRE TAN/ WHT WIRE TAN/BLK WIRE TAN/WHT WIRE TEMP GAUGE TRANS FUSE 20 TRANSMISSION RANGE SELECTOR (LEFT SIDE OF TRANSMISSION) TRUNK, TAILGATE, FUEL DOORS SYSTEM TRUNK/TAIL- GATE/FUEL DOORS SYSTEM UP SHIFT VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT END OF I/P) W/ DRL ONLY W/O DRL ONLY WARNING SYSTEMS WHT TAN/ WIRE WHT WIRE YEL WIRE

ASHTRAY LAMP AUXILIARY A/C-HEATER FRONT CONTROL LAMP BLK WIRE BRN WIRE CONVENIENCE CENTER DK GRN WIRE FOUR-WHEEL DRIVE ILLUMINATION LAMP FUSE BLOCK FUSE BLOCK PNL LPS FUSE GRY WIRE HEADLIGHT SWITCH ASSEMBLY HEATER A/C CONTROL LAMPS HEATER CONTROL LAMPS HIGH DIM HOT AT ALL TIMES INSTRUMENT CLUSTER LIGHT SWITCH OFF HEAD PARK ORG/ WIRE PANEL DIMMER SWITCH (ASSEMBLY) PARK LP FUSE RADIO REAR DEFOGGER LAMP SOLID STATE

A/C CLUTCH RELAY A/C CONTROL MODULE ANTILOCK BRAKE MODULE AUXILLIARY AUXILLIARY HEATER-A/C HEATER-A/C REAR LOGIC CONTROL MODULE AUXILLIARY HEATER-A/C FRONT CONTROL BLU WIRE BRAKE FUSE BRN WIRE BRN/WHT WIRE CONVENIENCE CENTER DK BLU WIRE DK GRN WIRE ELECTRONIC TRANSMISSION 4-SPEED AUTOMATIC W/OVERDRIVE FUSE FUSE BLOCK FUSIBLE LINK GLOW PLUG CONTROL MODULE GLOW PLUG FUSE GRY WIRE HEATER BLOWER SWITCH HEAVY DUTY ELECTRONIC TRANSMISSION 4-SPEED AUTOMATIC W/OVERDRIVE HIGH BLOWER RELAY HTR A/C FUSE IGNITION SWITCH INSTRUMENT CLUSTER PRINTED CIURCUIT LEFT GLOW PLUGS LINK FUSIBLE LOW BLOWER RELAY MED BLOWER RELAY MODE DOOR MOTOR ORG/ WIRE PANEL DIMMER SWITCH ASSEMBLY (INTERIOR LIGHTS SYSTEM) PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PNL LPS FUSE POWERTRAIN CONTROL MODULE RIGHT GLOW PLUGS RR HVAC FUSE TEMP DOOR MOTOR TRANS FUSE TRANSFER CASE SWITCH VEHICLE SPEED SENSOR BUFFER MODULE W/ AIR CONDITIONING

A/C CLUTCH RELAY A/C CONTROL MODULE ANTILOCK BRAKE MODULE AUXILLIARY AUXILLIARY HEATER-A/C HEATER-A/C REAR LOGIC CONTROL MODULE AUXILLIARY BATTERY RELAY AUXILLIARY HEATER-A/C FRONT CONTROL BRAKE FUSE BRN WIRE BRN/WHT WIRE CONVENIENCE CENTER DK GRN WIRE ELECTRONIC TRANSMISSION 4-SPEED AUTOMATIC W/OVERDRIVE EXCEPT VIN Z FUSE FUSE BLOCK GRY WIRE HEATED OXYGEN SENSOR HEATER BLOWER SWITCH HEAVY DUTY ELECTRONIC TRANSMISSION 4-SPEED AUTOMATIC W/OVERDRIVE HIGH BLOWER RELAY HTR A/C FUSE IGNITION SWITCH INJ FUSE LOW BLOWER RELAY MED BLOWER RELAY MODE DOOR MOTOR ORG/ WIRE PANEL DIMMER SWITCH ASSEMBLY (INTERIOR LIGHTS SYSTEM) PNK WIRE PNK/BLK (OR PNK) WIRE PNK/BLK WIRE PNK/WHT WIRE PNL LPS FUSE RED WIRE RR HVAC FUSE TEMP DOOR MOTOR THROTTLE THROTTLE BODY FUEL BODY FUEL INJECTOR A INJECTOR B TRANS FUSE TRANSFER CASE SWITCH VEHICLE SPEED SENSOR BUFFER MODULE VIN Z ONLY W/ AIR CONDITIONING WHT WIRE

BACK BLK WIRE CONVENIENCE CENTER CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE DOWN DOWN ENTIRE SEAT ENTIRE SEAT DOWN FOR- WARD FORWARD/ REARWARD MOTOR REAR TILT MOTOR FRONT TILT MOTOR FUSE BLOCK HOT AT ALL TIMES ACC-BATT CIRCUIT BREAKER LT BLU WIRE ORG/BLK WIRE POWER SEAT SWITCH (LEFT SIDE OF DRIVER'S SEAT) REAR HEIGHT FRONT HEIGHT FRONT HEIGHT TAN WIRE UP REAR HEIGHT YEL WIRE

BLK WIRE BRN WIRE CONVENIENCE CENTER DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE FUSE BLOCK GAUGES FUSE GRY WIRE HOT IN RUN OR START LEFT FRONT POWER WINDOW MOTOR LEFT FRONT WINDOW UP LEFT REAR POWER WINDOW MOTOR LEFT REAR WINDOW DN UP LEFT REAR WINDOW SWITCH LT GRN WIRE MASTER WINDOW SWITCH PNK WIRE PNK/BLK WIRE PPL PPL PPL PPL/WHT WIRE RIGHT FRONT POWER WINDOW MOTOR RIGHT FRONT WINDOW DN UP RIGHT FRONT WINDOW SWITCH RIGHT REAR POWER WINDOW MOTOR RIGHT REAR WINDOW SWITCH RIGHT REAR WINDOW UP SWITCH ILLUMINATION LAMP TAN WIRE UP DN