GMC Pickup C3500 (1985-2000) nca Wiring diagrams

A/T M/T ACCY ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRAKE PRESSURE WARNING SWITCH (ON REAR OF EBCM CASTING) BRN WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DUAL FUEL TANKS SINGLE FUEL TANK ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF ENGINE COMPT) ENG-1 MINI FUSE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE CONTROLS SYSTEM RADIO ENGINE CONTROLS SYSTEM FUEL GAUGE SENDER (IN FRONT FUEL TANK) FUEL PUMP BALANCE MODULE (INSIDE LEFT SIDE OF FRAME RAIL) FUEL PUMP/ SENDER GAUGES FUSE 4 GRN WIRE HOT IN RUN OR START HOT IN RUN OR START FUSE/RELAY BLOCK (LEFT REAR OF ENGINE COMPT) HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) IGN E MINI FUSE IGN SW BRAKE IND BRAKE PSI PK BRAKE 33 33 IGNITION SWITCH LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PARK BRAKE SWITCH (ON PARK BRAKE PEDAL BRACKET) PNK 639 975 970 497 451 30 WIRE PNK PNK WIRE PNK PPL WIRE PNK WIRE PPL PPL/WHT WIRE RUN WIRE SECONDARY FUEL GAUGE SENDER (IN REAR FUEL TANK) TAN/WHT WIRE TRANS FUSE 20 TWISTED PAIR VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION, LEFT SIDE OF TRANSFER CASE VEHICLE SPEED SENSOR (VSS) ADAPTER VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT SIDE OF DASH) YEL/BLK WIRE

39 (OR 1020) 7.4L VIN J ONLY 900 419 507 389 12 5 15 4 FUEL RET MIL IND UPSHIFT IND SPEEDO ACCY ANTI- LOCK BRAKES IND ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM BAT IND HI BEAM IND BLK WIRE BLK/WHT WIRE BRAKE IND BRAKE PRESSURE WARNING SWITCH (ON UNDERSIDE OF ELECTRONIC BRAKE CONTROL MODULE) BRN WIRE BRN/WHT WIRE CHECK GAUGES IND CHECK GAUGES LAMP DRIVER CONVENIENCE CENTER DAYTIME RUNNING LAMPS IND AIR BAG IND DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF ENGINE COMPT) ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) FUEL GAUGE FUEL PUMP BALANCE MODULE (INSIDE LEFT SIDE OF FRAME RAIL) FUEL PUMP, SENDER (IN FUEL TANK) GRN WIRE GRY WIRE HEADLIGHTS SYSTEM HOT IN RUN OR START I/P FUSE BLOCK GAUGES FUSE 4 HOT IN RUN, BULB TEST OR START IGN IGN E MINI FUSE IGN SW BRAKE IND BRAKE PSI PK BRAKE 33 33 IGNITION COIL (TOP LEFT REAR OF ENGINE) IGNITION SWITCH ILLUMINATION INSTRUMENT CLUSTER LED DIMMING LEFT TURN IND LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PNK WIRE MALFUNC- TION INDICATOR LAMP NCA WIRE PARITY PRNDL PARK BRAKE SWITCH (ON PARK BRAKE PEDAL BRACKET) PNK WIRE PPL PPL 9 29 30 FUEL VSS VSS PPL/WHT WIRE PRNDL PRNDL A PRNDL B PRNDL C RIGHT TURN IND RUN WIRE SAFETY BELT IND SECONDARY FUEL GAUGE SENDER (IN REAR FUEL TANK) SECURITY IND SENS RTRN FUEL IN SERVICE ENGINE SOON SINGLE FUEL TANK DUAL FUEL TANKS SPEEDOMETER STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACH TAN WIRE TAN/WHT WIRE TEMP GAUGE OIL GAUGE TRANS FUSE 20 TRANSMISSION RANGE SWITCH TWISTED PAIR UNDERHOOD FUSE BLOCK UPSHIFT IND (M/T ONLY) VEHICLE CONTROL MODULE (VCM) (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION, LEFT SIDE OF TRAN- VEHICLE SPEED SENSOR (VSS) ADAPTER VOLTMETER WARNING SYSTEMS WHT WIRE YEL WIRE

BLK WIRE CARGO DOOR JAMB SWITCH (EXCEPT CREW CAB) COURTESY LAMPS CTRL CTSY FUSE 3 DOME DEFEAT DOOR JAMB FRONT DOME/ READING LAMPS GRY WIRE HEADLAMP, PANEL DIMMER SWITCH DOME LAMP DEFEAT HORN FUSE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK GAGES FUSE 4 I/P COMPART- MENT BOX LAMP I/P FUSE BLOCK IGN SW INTERIOR LAMP CONTROL MODULE (UNDER CENTER OF DASH) LAMP OUT LEFT FRONT DOOR COURTESY LAMP LEFT FRONT DOOR JAMB SWITCH LEFT I/P COURTESY LAMP LEFT ILLUMINATED VANITY MIRROR LEFT REAR DOOR COURTESY LAMP LEFT REAR DOOR JAMB SWITCH MIRRORS SYSTEM NCA WIRE ORG/ WIRE OVERHEAD CONSOLE LAMPS CIRCUIT PNK PNK WIRE PNK WIRE PPL REAR DOME READING LAMPS REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) RIGHT FRONT DOOR COURTESY LAMP RIGHT FRONT DOOR JAMB SWITCH RIGHT I/P COURTESY LAMP RIGHT ILLUMINATED VANITY MIRROR RIGHT REAR DOOR COURTESY LAMP RIGHT REAR DOOR JAMB SWITCH UNDERHOOD FUSE-RELAY CENTER UNDERHOOD REEL LAMP W/ OVERHEAD CONSOLE W/ RKE W/O OVERHEAD CONSOLE W/O RKE W/O RKE W/ RKE WHT WIRE

4-DOOR TRUCKS ONLY BLK WIRE CARGO DOOR JAMB SWITCH (SUBURBAN, TAHOE, YUKON) CTRL CTSY FUSE 3 DOME DEFEAT DOOR JAMB FRONT DOME AND READING LAMP GAGES FUSE 4 GRY WIRE HEADLAMP AND PANEL DIMMER SWITCH DOME LAMP DEFEAT COURTESY LAMPS HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P COMPARTMENT BOX LAMP I/P FUSE BLOCK IGN SW INTERIOR LAMP CONTROL MODULE (UNDER CENTER OF DASH) LAMP OUT LEFT FRONT DOOR JAMB SWITCH LEFT I/P COURTESY LAMP LEFT ILLUMINATED VANITY MIRROR LEFT REAR DOOR JAMB SWITCH MIRRORS SYSTEM NCA WIRE ORG/ WIRE PNK WIRE PPL REAR DOME AND READING LAMP REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) RIGHT FRONT DOOR JAMB SWITCH RIGHT I/P COURTESY LAMP RIGHT ILLUMINATED VANITY MIRROR RIGHT REAR DOOR JAMB SWITCH UNDERHOOD FUSE-RELAY CENTER HORN FUSE UNDERHOOD LAMP PPL UNDERHOOD REEL LAMP W/ RKE W/O RKE WHT WIRE

BLK WIRE CARGO LAMP CTRL CTSY FUSE 3 DOME DEFEAT DOME DEFEAT IGN SW DOOR JAMB FRONT DOME AND READING LAMP GRY WIRE HEADLAMP AND PANEL DIMMER SWITCH DOME LAMP DEFEAT COURTESY LAMPS HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P COMPARTMENT BOX LAMP I/P FUSE BLOCK I/P FUSE BLOCK GAGES FUSE 4 IGN SW INTERIOR LAMP CONTROL MODULE (UNDER CENTER OF DASH) LAMP OUT LEFT I/P COURTESY LAMP LEFT ILLUMINATED VANITY MIRROR MIRRORS SYSTEM NCA WIRE ORG/ WIRE PNK WIRE PPL (NOT USED) PPL PPL REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) RIGHT FRONT DOOR JAMB SWITCH LEFT FRONT DOOR JAMB SWITCH RIGHT I/P COURTESY LAMP RIGHT ILLUMINATED VANITY MIRROR UNDERHOOD FUSE-RELAY CENTER HORN FUSE UNDERHOOD LAMP UNDERHOOD REEL LAMP W/ RKE W/O RKE WHT WIRE

BLK WIRE BRN WIRE FRONT WINDSHIELD WASHER PUMP MOTOR HI LO HI MIST LO OFF INST WIPE PULSE HOT IN ACCY OR RUN I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) MIST OFF INST WIPE NCA WIRE PPL RED WIRE SOLID STATE WASH OFF WASHER SWITCH WINDSHIELD WIPER MOTOR MODULE WINDSHIELD WIPER/ WASHER SWITCH WIPER FUSE 11 WIPER SWITCH YEL WIRE

1134 1134 39 10 10 PARK BRAKE SIG IND BULB CHK IGNITION LAMP FEED PNK WIRE 33 33 BRAKE IND CTRL BRAKE WARN IN 592 592 150 DRL RELAY CTRL BLK WIRE BLK/WHT WIRE BRN WIRE BULB TEST CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DAYTIME RUNNING LAMP MODULE (BEHIND LEFT SIDE OF DASH) DAYTIME RUNNING LAMPS RELAY DIODE 203 DRL INDICATOR DRL-FOG FUSE 15 FOG LAMP RELAY FOG LAMP SWITCH GAUGES FUSE 4 GRN WIRE GROUND GRY WIRE HEAD OFF PARK HEAD- LAMP DIMMER SWITCH HEADLAMP, PANEL DIMMER SWITCH HIGH BEAM INDICATOR HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (LEFT SIDE OF DASH, IGNITION SWITCH ILLUM LAMP INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM (BRAKE WARNING INDICATOR) LEFT FOG LAMP LEFT HEAD- LAMP RIGHT HEAD- LAMP LIGHTING FUSE 8 LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OFF ON INDICATOR ORG/ WIRE PARK BRAKE WARNING SWITCH PK LPS FUSE 9 PNK WIRE PPL RED WIRE RIGHT FOG LAMP RUN WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT REAR OF ENGINE COMPT) W/ FOG LAMPS WHT WIRE YEL WIRE

6-WAY POWER SEAT CIRCUIT BLK WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DK BLU WIRE HOT AT ALL TIMES I/P FUSE BLOCK LEFT POWER LUMBAR SUPPORT MOTOR LEFT POWER SEAT LUMBAR SWITCH NCA WIRE ORG/ WIRE POWER SEAT ADJUSTER SWITCH PWR-ACCY CIRCUIT BREAKER RIGHT POWER LUMBAR SUPPORT MOTOR RIGHT POWER SEAT LUMBAR SWITCH

AUDIO ALARM MODULE AUX/PWR FUSE 7 AUXILIARY POWER CONNECTOR BLK WIRE BRN WIRE CIG LTR FUSE 13 CIGAR LIGHTER CONVENIENCE CENTER CRANK FUSE 8 DATA LINK CONNECTOR DOOR REMOTE CONTROL LOCK DOOR LOCK RELAY RECEIVER FROM UNDERHOOD FUSE-RELAY CENTER (DIAGRAM 1 OF 4) I/P FUSE BLOCK IGNITION SWITCH INSTRUMENT CLUSTER LEFT FRONT DOOR LOCK SWITCH LEFT FRONT RIGHT FRONT POWER DOOR LOCK DOOR LOCK AMPLIFIER SWITCH SWITCH RELAY LEFT POWER SEAT LOCK LOCK OFF OFF LOCK OFF M/T A/T MAXI FUSE 5 MAXI FUSE 6 MAXI FUSE 7 NCA WIRE ORG/ WIRE PNK WIRE POWER WDO CIRCUIT BREAKER PPL PWR-ACCY CIRCUIT BREAKER RADIO RADIO BATT FUSE 19 RADIO FUSE 17 REAR DOOR DOOR LOCK LOCK SWITCH CONTROL MODULE REAR WINDOW LOCKOUT SWITCH (4-DR) RED WIRE REMOTE CONTROL DOOR LOCK RECEIVER RIGHT FRONT DOOR LOCK SWITCH RIGHT FRONT POWER LUMBAR SEAT SWITCH RIGHT FRONT POWER POWER WINDOW WINDOW MASTER SWITCH SWITCH (2 DR, UTILITY) RR WIPER FUSE 23 WIPER FUSE 11 RUN WIRE STARTER RELAY UNDERHOOD FUSE-RELAY CENTER STOP/HAZ FUSE 1 SUBURBAN ONLY SUBURBAN/ UTILITY PICKUP T CASE FUSE 2 TCC/STOPLAMP SWITCH TO I/P FUSE BLOCK (DIAGRAM 4 OF 4) TO SECURITY/ STRG FUSE 21 (DIAGRAM 4 OF 4) TO UNDERHOOD FUSE-RELAY CENTER (DIAGRAM 3 OF 4) TRANS FUSE 20 TRANS- MISSION TRANSFER CASE CONTROL MODULE TURN/ HAZARD SWITCH UNDERHOOD FUSE-RELAY CENTER W/BENCH SEAT W/O BENCH SEAT WHT WIRE WINDSHIELD RADIO WIPER MOTOR MODULE YEL WIRE

4.3L PNK WIRE 7.4L 6.5L 7.4L W/ CALIFORNIA EMISSIONS OTHERS A/C CLUTCH RELAY A/T M/T AIR BAG FUSE 10 AIR INJECTION REACTION SECONDARY RELAY BACKUP LAMP SWITCH BLK WIRE CAMSHAFT EXHAUST POSITION GAS SENSOR RECIRCULATION VALVE CONVENIENCE CENTER DAYTIME AUDIO RUNNING ALARM MODULE LAMPS RELAY DIESEL ONLY PNK WIRE EGR SOLENOID ELECTROCHROMATIC MIRROR W/ COMPASS ELECTRONIC INJECTION PUMP ENG-1 MINI FUSE EVAPORATIVE EMISSION CANISTER VENT EVAPORATIVE FUEL EMISSIONS PUMP CANISTER PURGE BALANCE SOLENOID VALVE RELAY FROM IGNITION SWITCH (DIAGRAM 2 OF 4) FUEL EGR GLOW WATER-IN- HEATER VENT PLUG FUEL SOLENOID CONTROL SENSOR MODULE FUEL FUEL FUEL INJECTOR INJECTOR INJECTOR FUEL FUEL INJECTOR INJECTOR FUEL INJECTOR FUEL PUMP BALANCE MODULE FUEL SOL MINI FUSE ECM 1 MINI FUSE FUEL TANK DAYTIME SENDER RUNNING I/P MODULE LAMPS CLUSTER MODULE (4.3L) GASOLINE DIESEL 5.0L, 5.7L 4.3L GAUGES FUSE 4 HEATED HEATED MASS OXYGEN OXYGEN AIRFLOW SENSOR 1 SENSOR 2 SENSOR HEATED HEATED OXYGEN OXYGEN SENSOR 4 SENSOR 3 I/P FUSE BLOCK IGN E MINI FUSE IGNITION CRANK- CONTROL SHAFT MODULE POSITION SENSOR IGNITION CRANK- FUEL CONTROL SHAFT INJECTOR MODULE POSITION SENSOR INFLATABLE RESTRAINT I/P MODULE ENABLE SWITCH INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE M/T MASS AIR FLOW SENSOR NCA WIRE PNK WIRE POWER STEERING CONTROL MODULE POWERTRAIN CONTROL MODULE TRANSFER CASE CONTROL MODULE TURN B/U FUSE 16 TURN SIGNAL SWITCH UNDERHOOD FUSE-RELAY CENTER VEHICLE CONTROL MODULE VEHICLE IGNITION CONTROL COIL MODULE WASTEGATE SOLENOID YEL WIRE