GMC Pickup C3500 (1985-2000) wht Wiring diagrams

BLK WIRE CIG LTR FUSE 13 CIRCUIT BREAKER A CONVENIENCE CENTER DOOR LOCK RELAY (UNDER I/P, RIGHT SIDE OF BRAKE PEDAL BRACKET) FUSE BLOCK GRY WIRE HOT AT ALL TIMES LEFT FRONT DOOR LOCK MOTOR SOLID STATE LEFT FRONT DOOR LOCK SWITCH LEFT REAR DOOR LOCK MOTOR SOLID STATE LOCK UNLOCK LT BLU WIRE ORG/ WIRE RIGHT FRONT DOOR LOCK MOTOR SOLID STATE RIGHT FRONT DOOR LOCK SWITCH RIGHT REAR DOOR LOCK MOTOR SOLID STATE TAN WIRE UNLOCK LOCK UNLOCK RELAY LOCK RELAY WHT WIRE

AUDIO ALARM MODULE (ON CONVENIENCE CENTER) AUTOMATIC TRANSFER CASE CONTROL SWITCH (LUXURY) AUTOMATIC TRANSFER CASH SELECT SWITCH AUXILIARY HEATER CONTROL BASE BLK WIRE CARGO LAMP SWITCH (PICKUP ONLY) TRANSFER CASE SWITCH CONVEN- IENCE CENTER DAYTIME RUNNING LAMP (DRL)/ RADIO OVERRIDE SWITCH DAYTIME RUNNING LAMPS (DRL)/ RADIO OVERRIDE SWITCH DISPLAY DIM SIG DISPLAY DISPLAY DIM DIM SIG SIG FOG LAMP SWITCH FRONT AUXILIARY HVAC CONTROL LAMP GRN WIRE GRY WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES HVAC CONTROL LAMP I/P FUSE BLOCK ILLUM FUSE 14 ILLUMINATION INFLATABLE RESTAINT I/P MODULE SWITCH INSTRUMENT CLUSTER LIFTGATE RELEASE SWITCH (SUBUR- BAN/ UTILITIY ONLY) LUXURY OFF ORG/ WIRE PARADE MODE SW PARK PARK LPS FUSE 9 PICKUP/ EXTENDED CAB ONLY PPL PPL PPL RADIO RADIO INFLATABLE RESTAINT I/P MODULE SWITCH REAR AUXILIARY HVAC CONTROL LAMP REAR AUXILIARY HVAC CONTROL SWITCH REAR WINDOW WIPER/ WASHER SWITCH RHEO- STAT SUBURBAN, UTILITY ONLY SWITCH (SUBUR- BAN/ UTILITIY ONLY) TRANSFER CASE SHIFT ILLUMINATION LAMP TRANSFER CASE SWITCH WHT WIRE

BATTERY BATTERY LIFTGATE/CARGO REL BLK WIRE BLK/WHT WIRE CARGO DOOR CONTACT SWITCH CONVENIENCE CENTER DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DOOR JAMB SWITCH IN PNK IGNITION WIRE DOOR LOCK RELAY 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 I/P FUSE BLOCK (LOWER LEFT SIDE OF I/P) 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 OR 540 OR 56 ORG/ 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 UNLOCK SIGNAL 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

& CRUISE FUSES A/T M/T AUX FAN MINI FUSE AUXILIARY COOLING FAN RELAY BLK WIRE BLK/RED WIRE BRAKE LAMP RELAY BRAKE PRESSURE MODULATOR VALVE BRN WIRE CRANK FUSE 8 DIAGNOSTIC ENERGY RESERVE MODULE FUEL PUMP RELAY FUSIBLE HEATER-A/C CONTROL I/P FUSE BLOCK IGNITION SWITCH INSTRUMENT CLUSTER LEFT RIGHT BATTERY BATTERY LINK LOCK LOCK OFF MAXI FUSE MAXI FUSE 2 MAXI FUSE 4 MAXI FUSE 5 MAXI FUSE 6 MAXI FUSE 7 MAXI FUSE 8 NCA WIRE OFF ORG/ WIRE PNK WIRE PPL RED WIRE REMOTE BATTERY STUD RR-DEFOG MINI FUSE RUN WIRE STARTER GENERATOR MOTOR SOLENOID TO BLOWER RELAYS TO CTSY, PK LPS, DRL/FOG FUSES, HEAD- LAMP SWITCH TO ECM-B, HORN, A/C COMP FUSES TO GAUGES, AIR BAG FUSES TO HTR-A/C, TO IGN-E, ECM-I, ENG-1 FUSES TO RADIO/ BATT, CIG LTR, AUX PWR FUSES, PWR ACCY BREAKER TO WIPER, RADIO, REAR WIPER FUSES TRANS FUSE 20 TRANS- MISSION TRANSMISSION CLUTCH RANGE SWITCH SWITCH UNDERHOOD FUSE-RELAY CENTER WHT WIRE YEL WIRE

A/C COMP MINI FUSE A/C LOW PRESSURE CUTOUT SWITCH AUXILIARY COOLING FAN RELAY BRN WIRE CONVENIENCE CENTER ECM-B MINI FUSE ECM-I MINI FUSE ELECTRONIC INJECTION PUMP ENG-I MINI FUSE FROM AUX FAN FUSE FROM IGNITION SWITCH FROM MAXI FUSE 6 FUEL PUMP OIL PRESSURE SWITCH/ SENDER FUEL PUMP RELAY FUEL SOL MINI FUSE GLOW PLUG RELAY HIGH BLOWER RELAY HORN MINI FUSE HORN RELAY I/P FUSE BLOCK IGN E MINI FUSE LOW BLOWER RELAY MAXI FUSE 3 MEDIUM BLOWER RELAY ORG/ WIRE PNK WIRE 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 WATER EGR IN FUEL SOLENOID SENSOR VALVE WHT WIRE WIPER FUSE 11 WIPER MOTOR MODULE WIPER/ WASHER SWITCH YEL WIRE

& CRUISE FUSES A/T M/T AUX FAN MINI FUSE AUXILIARY COOLING FAN RELAY BATTERY BLK WIRE BLK/RED (OR BLK) WIRE BRAKE LAMP RELAY BRAKE PRESSURE MODULATOR VALVE BRN WIRE CRANK FUSE 8 DIAGNOSTIC ENERGY RESERVE MODULE EXCEPT 4.3L FUSIBLE HEATER-A/C CONTROL I/P FUSE BLOCK IGNITION SWITCH INSTRUMENT CLUSTER LINK LOCK LOCK OFF M/T ONLY MAXI FUSE MAXI FUSE 2 MAXI FUSE 4 MAXI FUSE 5 MAXI FUSE 6 MAXI FUSE 7 MAXI FUSE 8 NCA WIRE OFF ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL RED WIRE REMOTE BATTERY STUD RR-DEFOG MINI FUSE RUN WIRE STARTER GENERATOR MOTOR SOLENOID TO BLOWER RELAYS TO CTSY, PK LPS, DRL/FOG FUSES, HEAD- LAMP SWITCH TO ECM-B, HORN, A/C COMP FUSES TO GAUGES, AIR BAG FUSES TO HTR-A/C, TO IGN-E, ECM-I, ENG-1 FUSES TO RADIO/ BATT, CIG LTR, AUX PWR FUSES, PWR ACCY BREAKER TO WIPER, RADIO, REAR WIPER FUSES TRANS FUSE 20 TRANS- MISSION TRANSMISSION CLUTCH RANGE SWITCH SWITCH UNDERHOOD FUSE-RELAY CENTER WHT WIRE YEL 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

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

A/T ACCY BLK WIRE BULB TEST CRANK FUSE 8 DIESEL EXCEPT DIESEL (BASE) EXCEPT DIESEL (UPLEVEL) HOLD- IN COIL I/P FUSE BLOCK (LEFT SIDE OF DASH, IGN A FUSE 6 IGNITION SWITCH LEFT BATTERY (DIESEL) LOCK OFF MEGA FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT, NEAR BATTERY) NCA WIRE POWER DISTRIBUTION SYSTEM PPL PPL (RIGHT FRONT WHEELHOUSE) CLUTCH PEDAL POSITION SWITCH (TOP OF CLUTCH PEDAL) PPL A/T M/T PPL PPL PULL- IN COIL RED WIRE REMOTE BATTERY STUD RIGHT BATTERY RUN WIRE STARTER MOTOR STARTER RELAY STARTER SOLENOID TRANSMISSION RANGE SWITCH (LEFT SIDE OF TRANSMISSION) WHT WIRE YEL WIRE