Chevrolet Cab & Chassis C3500 (1989-2000) instrument cluster Wiring diagrams

1-2 SHIFT SOL 2-3 SHIFT SOL 3-2 SHIFT SOL TRANS FLUID TEMP (TFT) SENSOR 450 450 551 413 451 417 (4.3L ONLY) BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) DK BLU WIRE ECM I FUSE ECM-B FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GAGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF DASH) PPL PPL PNK WIRE PPL/WHT WIRE RANGE MODE SELECTOR PRESSURE CONTROL SOLENOID RED WIRE RED/BLK WIRE RUN WIRE SERVICE ENGINE SOON SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL TCC/STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (RIGHT SIDE OF TBI) TRANS FUSE 20 TRANSMISSION UNDERHOOD FUSE/RELAY CENTER VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF DASH) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL 2-3 SHIFT SOL 3-2 SHIFT SOL TRANS FLUID TEMP (TFT) SENSOR 450 450 551 413 451 417 (4.3L ONLY) BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) DK BLU WIRE ECM I FUSE ECM-B FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GAGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF DASH) PPL PPL PNK WIRE PPL/WHT WIRE RANGE MODE SELECTOR PRESSURE CONTROL SOLENOID RED WIRE RED/BLK WIRE RUN WIRE SERVICE ENGINE SOON SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL TCC/STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (RIGHT SIDE OF TBI) TRANS FUSE 20 TRANSMISSION UNDERHOOD FUSE/RELAY CENTER VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF DASH) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

ALL OTHERS BLK (OR RED) WIRE BLK WIRE BRN WIRE CHARGE WARNING INDICATOR FUSIBLE LINK GAUGES FUSE 4 GENERATOR GENERATOR (W/ DUAL GENERATORS) HOT IN RUN, START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) INSTRUMENT CLUSTER LEFT BATTERY MEGA FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT, NEAR BATTERY) NCA WIRE PNK 22 WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE RIGHT BATTERY UPLEVEL/ ENHANCED

BLK WIRE BRN WIRE BULB CHECK DAYTIME RUNNING LAMP INDICATOR DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF I/P) DAYTIME RUNNING LAMPS RELAY (ENGINE COMPARTMENT FRONT PLENUM PANEL) DK BLU/WHT WIRE DRL FUSE FUSE BLOCK GRN WIRE HEAD PARK HEADLAMP DIMMER SWITCH HEADLIGHT SWITCH ASSEMBLY HI BEAM INDICATOR HI LO HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START GAUGES FUSE HTR A/C FUSE IGNITION LAMP FEED HI BEAM FEED HI BEAM INDICATOR OUTPUT TO RELAY GROUND INSTRUMENT CLUSTER LEFT HEADLAMP ASSEMBLY LT GRN WIRE LT GRN/BLK WIRE LT LT OFF OFF HEAD ORG/ WIRE PARK PARK BRAKE WARNING SWITCH (AT PARK BRAKE, UNDER LEFT SIDE OF I/P) PICKUP ONLY PNK/BLK WIRE RIGHT HEADLAMP ASSEMBLY SUBURBAN, UTILITY ONLY TAN WIRE TAN/WHT 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

4 WHEEL CONTROL DRIVE MODULE LOW (UNDER RIGHT SIGNAL END OF I/P) 4 WHEEL DRIVE INPUT (NOT USED) AUTOMATIC TRANSMISSION ONLY BLK WIRE BRN WIRE BRN/WHT WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE EHCU MODULE (NEAR MASTER CYLINDER) FRONT AXLE ACTUATOR SOLENOID (RIGHT SIDE OF FRONT DRIVE AXLE) FRONT AXLE SOLENOID SWITCH (RIGHT REAR SIDE OF FRONT DRIVE AXLE) FUSE GRY WIRE HOT IN RUN I/P FUSE BLOCK INDICATOR LAMP INSTRUMENT CLUSTER LT BLU WIRE PANEL DIMMER SWITCH (ASSEMBLY) PANEL LPS FUSE PICKUP PNK/WHT WIRE POWERTRAIN PPL RWAL DIODE MODULE (UNDER LEFT SIDE OF I/P) SUBURBAN, YUKON TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP (AT TRANSFER CASE SELECTOR LEVER) TRANSFER CASE SWITCH (LEFT TOP OF TRANSFER CASE)

4 WHEEL CONTROL DRIVE MODULE LOW (UNDER RIGHT SIGNAL END OF I/P) 4 WHEEL DRIVE INPUT (NOT USED) AUTOMATIC TRANSMISSION ONLY BLK WIRE BRN WIRE BRN/WHT WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE EHCU MODULE (NEAR MASTER CYLINDER) FRONT AXLE ACTUATOR SOLENOID (RIGHT SIDE OF FRONT DRIVE AXLE) FRONT AXLE SOLENOID SWITCH (RIGHT REAR SIDE OF FRONT DRIVE AXLE) FUSE GRY WIRE HOT IN RUN I/P FUSE BLOCK INDICATOR LAMP INSTRUMENT CLUSTER LT BLU WIRE PANEL DIMMER SWITCH (ASSEMBLY) PANEL LPS FUSE PICKUP PNK/WHT WIRE POWERTRAIN PPL RWAL DIODE MODULE (UNDER LEFT SIDE OF I/P) SUBURBAN, YUKON TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP (AT TRANSFER CASE SELECTOR LEVER) TRANSFER CASE SWITCH (LEFT TOP OF TRANSFER CASE)

4 WHEEL DRIVE LOW (UNDER RIGHT END OF I/P) SIGNAL AUTOMATIC TRANSMISSION ONLY BLK WIRE BRN WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE FRONT AXLE ACTUATOR SOLENOID (RIGHT SIDE OF FRONT DRIVE AXLE) FRONT AXLE SOLENOID SWITCH (RIGHT REAR SIDE OF FRONT DRIVE AXLE) FUSE GRY WIRE HOT IN RUN I/P FUSE BLOCK INDICATOR LAMP INSTRUMENT CLUSTER LT BLU WIRE PANEL DIMMER SWITCH (ASSEMBLY) PANEL LPS FUSE PICKUP PNK/WHT WIRE POWERTRAIN CONTROL MODULE PPL PPL PPL RED WIRE RWAL DIODE MODULE (UNDER LEFT SIDE OF I/P) TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP (AT TRANSFER CASE SELECTOR LEVER) TRANSFER CASE RELAY (RIGHT REAR OF ENG COMPT, NEAR BATTERY JUNCTION BLOCK) TRANSFER CASE SWITCH (LEFT TOP OF TRANSFER CASE) TRANSFER CASE SYNCRONIZER