Chevrolet Pickup C3500 (1988-2000) data link connector Wiring diagrams

BLK/WHT WIRE DATA LINK CONNECTOR DIAGNOSTIC REQUEST DIAGNOSTIC TEST FOUR-WHEEL ANTI-LOCK BRAKE MODULE (NEAR MASTER CYLINDER) FUEL PUMP FUEL PUMP PRIME FUEL PUMP RELAY GRY WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT END OF I/P) RED WIRE SERIAL DATA TAN/WHT WIRE WHT/BLK WIRE

4-WHEEL ABS BLK/WHT WIRE DATA LINK CONNECTOR DIAGNOSTIC TEST FOUR-WHEEL ANTI-LOCK BRAKE MODULE (NEAR MASTER CYLINDER) FUEL PUMP FUEL PUMP PRIME FUEL PUMP RELAY GRY WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT END OF I/P) REAR WHEEL ABS RED WIRE RWAL MODULE (LEFT REAR ENGINE COMPT) VEHICLE SPEED INPUT SERIAL DATA VEHICLE SPEED INPUT VEHICLE SPEED OUTPUT VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) WHT WIRE WHT/BLK WIRE

4-WHEEL ABS BLK/WHT WIRE DATA LINK CONNECTOR DIAGNOSTIC TEST FOUR-WHEEL ANTI-LOCK BRAKE MODULE (NEAR MASTER CYLINDER) FUEL PUMP FUEL PUMP PRIME FUEL PUMP RELAY GRY WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT END OF I/P) REAR WHEEL ABS RED WIRE RWAL MODULE (LEFT REAR ENGINE COMPT) VEHICLE SPEED INPUT SERIAL DATA VEHICLE SPEED INPUT VEHICLE SPEED OUTPUT VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) WHT WIRE WHT/BLK WIRE

4-WHEEL ABS BLK/WHT WIRE DATA LINK CONNECTOR DIAGNOSTIC TEST FOUR-WHEEL ANTI-LOCK BRAKE MODULE (NEAR MASTER CYLINDER) FUEL PUMP FUEL PUMP PRIME FUEL PUMP RELAY GRY WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT END OF I/P) REAR WHEEL ABS RED WIRE RWAL MODULE (LEFT REAR ENGINE COMPT) VEHICLE SPEED INPUT SERIAL DATA VEHICLE SPEED INPUT VEHICLE SPEED OUTPUT VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) WHT WIRE WHT/BLK WIRE

BLK/WHT WIRE DATA LINK CONNECTOR DIAGNOSTIC REQUEST DIAGNOSTIC TEST FOUR-WHEEL ANTI-LOCK BRAKE MODULE (NEAR MASTER CYLINDER) FUEL PUMP FUEL PUMP PRIME FUEL PUMP RELAY GRY WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT END OF I/P) RED WIRE SERIAL DATA TAN/WHT WIRE WHT/BLK WIRE

ANTI-LOCK IND BATT GROUND BLK WIRE BLK/WHT WIRE BRAKE IND BRAKE PRESSURE WARNING LAMP WARNING (ON MASTER BRAKE CYLINDER) BRAKE WARN IND GROUND BRN WIRE CONVENIENCE CENTER DATA LINK CONNECTOR DIODE (BEHIND LEFT SIDE OF I/P) DK GRN WIRE HOT AT ALL TIMES UNDERHOOD FUSE/RELAY CENTER MAXI- FUSE 4 HOT IN RUN BRAKE FUSE 18 HOT IN RUN, BULB TEST OR START FUSE BLOCK GAGES FUSE 4 IGN FEED ABS IND BRAKE SW INSTRUMENT CLUSTER LEFT FNT SENS LO LEFT FRONT WHEEL SENSOR LT BLU WIRE LT GRN/BLK WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SENSOR RT FNT SENS LO LEFT FNT SENS HI RT FNT SENS HI TAN WIRE TAN/WHT WIRE TCC/STOPLAMP SWITCH (TOP OF BRAKE PEDAL) VEHICLE SPEED SENSOR (LEFT REAR OF TRANS) VSS BUFFER INPUT DLC WHT WIRE YEL WIRE

BLK/WHT WIRE BRAKE PRESSURE MODULATOR VALVE (NEAR BRAKE MASTER CLYINDER) DATA LINK CONNECTOR DIAGNOSTIC ENERGY RESERVE MODULE (BEHIND CENTER OF I/P) DIAGNOSTIC TEST DK BRN WIRE FUEL PUMP RELAY ORG/ WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT END OF I/P) RADIO RED WIRE REMOTE KEYLESS ENTRY MODULE (BEHIND CENTER OF I/P) SERIAL DATA TAN WIRE TAN/WHT WIRE WHT/BLK WIRE

ASHTRAY LAMP AUDIO ALARM MODULE AUTOMATIC FRONT TRANSFER AUXILIARY CASE POWER SELECT OUTLET SWITCH AUTOMATIC TURN/ TRANSFER HAZARD CASE FLASHER CONTROL MODULE AUXILIARY COOLING FAN MOTOR AUXILIARY HEATER CONTROL SWITCH (UTILITY) BLK WIRE BLK/GRY WIRE BLU WIRE BODY SHOCK CONTROL SENSOR MODULE BRAKE TRANS- MISSION SHIFT JAMB INTERLOCK IGNITION SWITCH SWITCH SWITCH CONVENIENCE CENTER DATA LINK CONNECTOR DAYTIME RUNNING LAMPS MODULE DK BLU WIRE FRONT HEATER, AUXILIARY A/C POWER CONTROL OUTLET SWITCH FRONT WINDSHIELD WIPER/ WASHER PUMP MOTOR GROUND STRAP HORN SWITCH HVAC CONTROL MODULE INFLATABLE CARGO RESTRAINT LAMP I/P MODULE SWITCH ENABLE (PICKUP) SWITCH KEY-IN WARNING BUZZER SWITCH (LUXURY) LEFT BATTERY LEFT FOG LAMP LEFT FRONT PARK/ TURN LAMP LEFT HIGH BEAM HEADLAMP LEFT HIGH/ LOW BEAM HEADLAMP LEFT HORN LEFT LOW BEAM HEADLAMP LIFTGATE FOG RELEASE LAMP SWITCH SWITCH (UTILITY) (LUXURY) LOW COOLANT VEHICLE LEVEL INTERFACE INDICATOR UNIT MODULE (LUXURY) (DIESEL) LUXURY PICKUP ONLY RADIO REAR STEREO CONTROLLER REAR WINDOW WASHER PUMP MOTOR REAR WINDOW WIPER/ WASHER SWITCH (UTILITY) RIGHT FOG LAMP RIGHT FRONT DOOR JAMB CIGAR SWITCH LIGHTER I/P COMPARTMENT LAMP RIGHT FRONT PARK/ TURN LAMP RIGHT HIGH BEAM HEADLAMP RIGHT HIGH/ LOW BEAM HEADLAMP RIGHT HORN RIGHT LOW BEAM HEADLAMP SPARE TRANSFER CASE CONTROL MODULE TRANSFER CASE SELECT SWITCH UNCOATED UNDER- HOOD LAMP W/ DUAL HORNS W/ QUAD HEADLAMPS W/ QUAD HEADLAMPS/ SPORT PACKAGE WINDSHIELD HEADLAMP WIPER, PANEL MOTOR DIMMER MODULE SWITCH

A.I.R. SOLENOID CHECK VALVE A/C COM- PRESSOR LOW CUTOUT SWITCH A/C COMPRESSOR CLUTCH AIR INJECTION REACTOR PUMP (7.4L ONLY) AIR PUMP MOTOR APPROX 10 CM FROM TRANSFER CASE RELAY BREAKOUT) BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BRAKE PRESSURE WARNING SWITCH CRUISE EVO CONTROL PASSLOCK MODULE MODULE DATA LINK CONNECTOR DIESEL DK GRN WIRE ELECTROCHROMIC LEFT REARVIEW ILLUMINATED MIRROR VANITY W/ COMPASS MIRROR ELECTRONIC BRAKE CONTROL MODULE EXCEPT UTILITY FRONT AXLE ACTUATOR FRONT AXLE TRANS ACTUATOR RANGE SWITCH FUEL HEATER FUEL PUMP A/C RELAY COMPRESSOR PRESSURE SWITCH FUSE BLOCK GASOLINE HEATED OXYGEN SENSOR BANK 1 SENSOR 1 HEATED OXYGEN SENSOR BANK 1 SENSOR 2 IGNITION CONTROL MODULE A/C COMPRESSOR CYCLING SWITCH INFLATABLE RESTRAINT FRONT END SENSOR INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT CLUSTER LOW COOLANT GLOW LEVEL PLUG SENSOR RELAY MASS AIRFLOW SENSOR PARK/ NEUTRAL POSITION SWITCH RIGHT ILLUMINATED VANITY MIRROR ROOF MARKER LAMPS STARTER STOPLAMP RELAY RELAY TRANSFER CASE RELAY TRANSFER CASE SHIFT CONTROL MODULE TRANSFER CASE SHIFT SWITCH UNDERHOOD UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK A/C COMPRESSOR CLUTCH RELAY VEHICLE CONTROL MODULE VEHICLE SPEED SENSOR WATER IN FUEL FILTER WATER VALVE (UTILITY)

BLK WIRE BLK/WHT WIRE BRN WIRE CHASSIS CAB CONVENIENCE CENTER DATA LINK CONNECTOR ENDGATE ENDGATE CLEARANCE LAMPS EVRV ELECTRONIC VACUUM REGULATOR VALVE SOLENOID FUEL PUMP FUEL PUMP RELAY HEAVY DUTY TRAILER HOT FUEL HANDLING MODULE KNOCK SENSOR MODULE LEFT CARGO DOOR DEFOGGER GRID LEFT DOOR CONTACT SWITCH LEFT FRONT CLEARANCE LAMP LEFT LICENSE LAMP LEFT REAR CENTER TAIL, STOP, HIGH LICENSE, MOUNT TURN AND STOPLAMP BACKUP LAMPS LEFT REAR CLEARANCE LAMP LEFT REAR FENDER LEFT REAR TAIL, STOP, TURN AND BACKUP LAMPS LEFT TAIL/ STOP, TURN AND BACKUP LAMP ORN/ PARK/ NEUTRAL POSITION SWITCH PICKUP (W/O DUAL REAR WHEELS), SUBURBAN AND UTILITY PICKUP WITH DUAL REAR WHEELS POWERTRAIN CONTROL MODULE (PCM) REAR DOOR W/ AUXILLIARY JAMB SWITCH HEATER, AIR CONDITIONING REAR ENDGATE LIFTGATE WINDOW WINDOW DEFOGGER RELEASE GRID SOLENOID REAR WIPER MOTOR MODULE RIGHT CARGO DOOR DEFOGGER GRID RIGHT DOOR CONTACT SWITCH RIGHT FRONT CLEARANCE LAMP RIGHT GAS STRUT CYLINDER RIGHT LEFT LICENSE LICENSE LAMP LAMP RIGHT LICENSE LAMP RIGHT REAR CLEARANCE LAMP RIGHT REAR FENDER RIGHT REAR TAIL, STOP, LICENSE, TURN AND BACKUP LAMPS RIGHT REAR TAIL, STOP, TURN AND BACKUP LAMPS RIGHT TAIL/ STOP, TURN AND BACKUP LAMP SUBURBAN, UTILITY NON-BASE VEHICLE SUBURBAN, UTILITY W/ AUTOMATIC TRANSMISSIONS SUBURBAN/ UTILITY TAN WIRE TAN/WHT WIRE TEMPER- ATURE BLOWER MODE MODE DOOR MOTOR DOOR (REAR) RELAY MOTOR TRAILER) VEHICLE SPEED SENSOR BUFFER W/ REAR AUXILLIARY HEATER ONLY W/HD AUTOMATIC TRANSMISSION) WHT WIRE WHT/ BLK WIRE WITH ENDGATE