GMC Pickup C1500 (1985-1999) (engine harness, approx Wiring diagrams

7.4L A/C COMP FUSE A/C COMPRESSOR CLUTCH RELAY ABS FUSE 4 AUX FAN FUSE AUXILIARY COOLING FAN RELAY AUXILIARY HIGH BLOWER MOTOR RELAY BLK WIRE BLOWER FUSE 3 BLU WIRE BRAKE CONTROL MODULE BREAKOUT) BRAKE LAMP RELAY UNDERHOOD FUSE-RELAY CENTER HEADLAMP AND PANEL DIMMER SWITCH CAMP/TRAIL FUSE CARGO LAMP SWITCH CONVENIENCE CENTER CONVENIENCE CENTER EVO/ PASSLOCK MODULE CTSY FUSE 3 RADIO BATT FUSE 19 DAYTIME RUNNING LAMPS RELAY DIESEL GASOLINE DIODE DRL/FOG FUSE 15 DUAL BATTERY ECM-B FUSE ELECTRONIC BRAKE CONTROL MODULE FOG LAMP RELAY FRONT DOME/ READING LAMPS FUEL PUMP OIL PRESSURE SWITCH AND SENDER FUEL PUMP RELAY UNDERHOOD FUSE-RELAY CENTER FUSIBLE LINK (10 GA-RUST) GAS ONLY GENERATOR (BASE) GENERATOR (UPLEVEL) HEADLAMP AND PANEL DIMMER SWITCH INSTRUMENT CLUSTER (POLICE PACKAGE) HEATER AND A/C CONTROL SWITCH HORN FUSE HORN UNDERHOOD RELAY REEL LAMP UNDERHOOD FUSE- (GAS RELAY CENTER ONLY) I/P COMPARTMENT BOX LAMP I/P FUSE BLOCK INFLATABLE RESTRAINT SWITCH BREAKOUT) INTERIOR LAMP CONTROL MODULE LEFT BATTERY (DIESEL) LEFT RIGHT ILLUMINATED ILLUMINATED VANITY VANITY MIRROR MIRROR MEGA FUSE BLOCK NCA WIRE ORG/ WIRE PICKUP ONLY PK LPS FUSE 9 AUX FUSE 22 POLICE PACKAGE ONLY POWERTRAIN CONTROL MODULE (DIESEL) REAR HOMELINK OVERHEAD DOME/ TRANSMITTER CONSOLE READING READING LAMPS LAMPS RED WIRE REMOTE BATTERY STUD RIGHT BATTERY RIGHT FRONT DOOR COURTESY LAMP RIGHT LEFT COURTESY COURTESY LAMP LAMP ROOF CLEARANCE LAMP SWITCH RR DEFOG FUSE SECURITY/STRG FUSE 21 SEO FUSE SINGLE BATTERY (BASE) SINGLE BATTERY (UPLEVEL) SPARE POWER SOURCE SPOTLAMP SPOTLAMP CONVENIENCE (POLICE (POLICE RADIO CENTER PACKAGE) PACKAGE) STARTER MOTOR SOLENOID STOP FUSE 2 LIGHTING FUSE 8 TO FUSIBLE LINK (DIAGRAM 4 OF 5) TO MEGAFUSE (DIAGRAM 5 OF 5) TO UNDERHOOD FUSE-RELAY CENTER (DIAGRAM 2 OF 5) UNDERHOOD FUSE-RELAY CENTER UNDERHOOD LAMP VEHICLE CONTROL MODULE (GASOLINE) YEL WIRE

4.3L PNK WIRE 6.5L 7.4L W/ CALIFORNIA EMISSIONS OTHERS A/C CLUTCH RELAY A/C COMPRESSOR CLUTCH RELAY A/T M/T AIR BAG FUSE 10 AIR RELAY BACKUP LAMP SWITCH BREAKOUT) COLUMN HARNESS BREAKOUT) PNK WIRE CONVENIENCE CENTER CRANK- FUEL SHAFT INJECTOR POSITION SENSOR DAYTIME AUDIO RUNNING ALARM LAMPS MODULE RELAY ECM-1 MINI FUSE EGR FUEL GLOW EGR LINEAR HEATER PLUG BOOST PWM VALVE RELAY SOLENOID SOLENOID ELECTRIC SHIFT ELECTROCHROMATIC REARVIEW MIRROR W/ COMPASS ENG-1 MINI FUSE ENGINE SHUTOFF SOLENOID EVAPORATIVE EMISSION CANISTER VENT EVO/ PASSLOCK MODULE FROM EBCM BREAKOUT) FROM IGNITION SWITCH (DIAGRAM 2 OF 5) FROM STEERING COLUMN HARNESS BREAKOUT) FUEL FUEL FUEL INJECTOR INJECTOR INJECTOR FUEL FUEL INJECTOR INJECTOR FUEL INJECTOR FUEL INJECTOR BREAKOUT) FUEL SOLENOID DRIVER FUEL TANK DAYTIME SENDER RUNNING INSTRUMENT MODULE LAMPS CLUSTER MODULE (4.3L) GASOLINE DIESEL 5.0L, 5.7L 4.3L 7.4L GAUGES FUSE 4 HEATED HEATED OXYGEN OXYGEN SENSOR SENSOR BANK 1 BANK 1 SENSOR 3 SENSOR 2 I/P FUSE BLOCK IGN E MINI FUSE IGNITION CONTROL MODULE INFLATABLE RESTRAINT I/P MODULE SWITCH INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE M/T MASS AIR FLOW SENSOR PARK/ NEUTRAL POSITION SWITCH PNK FUEL INJECTOR BREAKOUT) WIRE PNK WIRE POWERTRAIN CONTROL MODULE TURN B/U FUSE 16 TURN SIGNAL SWITCH UNDERHOOD FUSE-RELAY CENTER VEHICLE IGNITION CONTROL COIL MODULE WATER-IN- EGR FUEL SOLENOID SENSOR YEL WIRE