GMC Cab & Chassis C3500 (1985-2000) Power distribution circuit, diesel

ACCY ACCY BULB TEST LOCK OFF AUDIO ALARM AUXILLARY COOLING FAN RELAY BLK WIRE BLK/RED WIRE BRN WIRE BULB TEST CIGARETTE LIGHTER CIRCUIT BREAKER CLUTCH PEDAL SWITCH CONVEN- IENCE CENTER CONVENIENCE CENTER CRANK FUSE CTSY FUSE PARK LPS FUSE DAYTIME RUNNING LAMPS RELAY FUEL PUMP RELAY FUSE BLOCK FUSES FUSIBLE FUSIBLE LINK GENERATOR GLOW PLUG CONTROLLER GRY WIRE HEADLIGHT SWITCH ASSEMBLY HORN RELAY (CONVENIENCE CENTER) HTR-A/C, RR HVAC, IGNITION SWITCH LEFT BATTERY RIGHT BATTERY LINK LOCK LOCK OFF LOW BLOWER MEDIUM HIGH RELAY BLOWER BLOWER RELAY RELAY MODULE OFF ORG/ WIRE PNK WIRE POWERTRAIN FUEL CONTROL PUMP/OIL MODULE PRESSURE (PCM) SWITCH PPL PPL/ WHT WIRE PWR RADIO DOME LAMP REAR WINDOW RELEASE RELAY REAR WINDOW RELEASE SWITCH RED WIRE RR WPR, FRT WPR, RDO FUSES AND AND PWR WDO CIRCUIT BREAKER RUN WIRE STARTER MOTOR SOLENOID STOP FUSE SUBURBAN, UTILITY EXC. SUBURBAN, UTILITY SUBURBAN, UTILITY ONLY T/G REL FUSE DRL FUSE TRANS ECM-IGN, GLOW TURN B/U FUSE PLUGS, GAUGES FUSES W/ AUTO TRANS W/ AUTOMATIC TRANSMISSION WHT PPL/ WIRE YEL 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

BLK ORG/ WIRE BLK WIRE BRN WIRE CIRCUIT BREAKER CONVENIENCE CENTER FRT WPR FUSE FUSE BLOCK FUSIBLE LINK IGNITION SWITCH IN-LINE FUSE LEFT FRONT POWER WINDOW SWITCH LEFT POWER SEAT ORG BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE POWER POWER DOOR LOCK RELAY POWER OUTSIDE MIRROR SWITCH PWR WDO CIRCUIT BREAKER RADIO RDO FUSE REAR WINDOW DEFOGGER SWITCH REAR WIPER/ WASHER SWITCH RED WIRE RIGHT FRONT POWER WINDOW SWITCH RIGHT LEFT POWER POWER DOOR LOCK DOOR LOCK SWITCH SWITCH RIGHT LEFT REAR REAR POWER POWER WINDOW WINDOW SWITCH SWITCH RR WPR FUSE SUBURBAN, UTILTY ONLY WHT WIRE WIPER MOTOR MODULE WIPER/ WASHER SWITCH 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

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

ALL EXCEPT PICKUP, 2 DOOR UTILITY W/O KEYLESS ENTRY AMPLIFIER RELAY AUDIO ALARM MODULE CONVENIENCE CENTER AUX PWR FUSE 7 AUXILIARY POWER FEED AUXILIARY POWER SUPPLY SOCKET BLK WIRE BUCKETS OR SPLIT BENCH ONLY CIG LTR FUSE 13 CIGARETTE LIGHTER CONVENIENCE CENTER DOOR RIGHT LOCK FRONT RELAY DOOR LOCK SWITCH FROM MAXI FUSE 7 HAZARD FLASHER (CONVENIENCE CENTER) I/P FUSE BLOCK LEFT LEFT FRONT FRONT POWER DOOR SEAT LOCK SWITCH LEFT REAR FRONT LIFTGATE DOOR RELEASE LOCK SWITCH SWITCH LEFT RIGHT FRONT FRONT POWER POWER LUMBAR LUMBAR SWITCH SWITCH ORG/ WIRE PICKUP/2 DOOR UTILITY W/O KEYLESS ENTRY ALL OTHER POWER ACCY CIRCUIT BREAKER RADIO RADIO BATT FUSE 19 RED WIRE REMOTE KEYLESS ENTRY MODULE RIGHT FRONT DOOR LOCK SWITCH STOP/ HAZARD FUSE 1 SUBURBAN, UTILITY ONLY TCC/ STOPLAMP SWITCH

AUDIO ALARM MODULE CONVENIENCE CENTER AUXILIARY COOLING FAN RELAY BACKUP LAMP SWITCH CONVENIENCE CENTER CRUISE CONTROL ACTIVATOR SWITCH CRUISE CONTROL MODULE DAYTIME RUNNING LAMPS MODULE (PICKUP ONLY) DAYTIME RUNNING LAMPS RELAY DK BLU WIRE ECM IGN FUSE EGR VENT SOLENOID EGR WIDTH MODULATED SOLENOID ENGINES ONLY) F/SOL FUSE FUEL HEATER FUEL INJECTION PUMP FUSE BLOCK GAUGES FUSE GLOW PLUG CONTROL MODULE IGNITION SWITCH INSTRUMENT CLUSTER PRINTED CIRCUIT LT BLU/BLK WIRE ONLY PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE PULSE WIDTH MODULATED BOOST SOLENOID REAR DEFOGGER SWITCH SOL FUSE TCC/ STOPLAMP SWITCH TURN SIGNAL FLASHER TURN-B/U FUSE WATER IN-FUEL SENSOR

AUDIO ALARM MODULE AUXILIARY HEATER/ A/C CONTROL REAR AUXILIARY REAR HEATER/ WIPER/ A/C CONTROL WASHER FRONT SWITCH CARGO LAMP SWITCH CONVENIENCE CENTER CTSY FUSE 3 DAYTIME RUNNING LAMPS RELAY DIODE DK GRN WIRE DRL/FOG FUSE 15 FOG FOG LAMP LAMP RELAY RELAY FOG LAMP SWITCH FROM MAXI FUSE 8 FRONT DOME/ READING LAMPS GLOVE BOX LAMP) GRY WIRE HEADLAMP AND PANEL DIMMER SWITCH I/P FUSE BLOCK ILLUM FUSE 14 INSTRUMENT CLUSTER LEFT FRONT DOOR COURTESY LAMP LEFT I/P SPARE COURTESY POWER LAMP SOURCE LEFT REAR DOOR COURTESY LAMP LEFT VANITY MIRROR ORG/ WIRE PARK LAMPS PICKUP ONLY PICKUP SUBURBAN, UTILITY PK LPS FUSE 9 RADIO HEATER/ CARGO LAMP A/C CONTROL SWITCH LAMP REAR DOME READING LAMPS REAR LIFTGATE RELEASE SWITCH RED WIRE REMOTE OUTSIDE MIRROR SWITCH RIGHT FRONT DOOR COURTESY LAMP RIGHT I/P COURTESY LAMP RIGHT REAR DOOR COURTESY LAMP RIGHT VANITY MIRROR SUBURBAN ONLY SUBURBAN, UTILITY ONLY TWO WHEEL DRIVE INDICATOR

ABS BRAKE MODULE AUXILIARY HEATER/ A/C CONTROL LOGIC MODULE AUXILIARY HEATER/ A/C CONTROL MODULE (FRONT) AUXILIARY HEATER/ A/C CONTROL MODULE (REAR) AUXILIARY STORAGE BATTERY RELAY BRAKE FUSE 18 BRN WIRE CONVENIENCE CENTER CRUISE CONTROL SWITCH CRUISE FUSE 6 FOUR- WHEEL DRIVE INDICATOR FROM IGNITION SWITCH FUSE 24 HEATER-A/C CONTROL HIGH BLOWER RELAY (REAR) HTR A/C FUSE 12 I/P FUSE BLOCK LOW BLOWER RELAY (REAR) MEDIUM BLOWER RELAY (REAR) ORG/ WIRE REAR AUXILIARY MODE DOOR MOTOR REAR AUXILIARY TEMPERATURE DOOR MOTOR RECIRC- ULATION DOOR MOTOR RR HVAC FUSE 5 (SUBURBAN ONLY) SPARE FOUR POWER WHEEL SOURCE DRIVE INDICATOR SPARE POWER SOURCE SUBURBAN, DIESEL ALL OTHERS TCC/ STOPLAMP SWITCH TEMPER- MODE ATURE DOOR DOOR MOTOR MOTOR

AIR BAG FUSE 10 ARMING SENSOR BACKUP LAMP SWITCH BRN WIRE CONVENIENCE CENTER CREWCAB, SUBURBAN, UTILITY ONLY DAYTIME AUDIO RUNNING ALARM LAMPS MODULE RELAY DAYTIME RUNNING LAMPS MODULE DIAGNOSTIC ENERGY RESERVE MODULE ELECTRO- CHROMIC MIRROR 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 LOW ENGINE COOLANT LEVEL MODULE M/T ONLY PNK WIRE PWR WDO CIRCUIT BRKR REAR WINDOW LOCKOUT SWITCH REMOTE KEYLESS ENTRY MODULE RIGHT FRONT POWER WINDOW SWITCH TURN B/U FUSE 16 TURN SIGNAL LAMP FLASHER VEHICLE SPEED SENSOR BUFFER MODULE YEL WIRE