Wiring Diagrams for GMC Yukon I (1991-1999)

5.7l (vin r), a/c circuit Heater circuit

6.5l (vin f), a/c circuit Heater circuit

5.7l (vin r), anti-lock brake circuits

6.5l (vin s), anti-lock brake circuits

Computer data lines

5.7l (vin r), cooling fan circuit

5.7l (vin r), cruise control circuit

6.5l (vin s), cruise control circuit

Defogger circuit

Electronic power steering circuit

Wiring diagram engine performance 5.7l (vin r)s

Wiring diagram engine performance 6.5l (vin s)s

Back-up lamps circuit Exterior lamps circuit

Ground distribution circuit

Headlight circuit, with quad headlamps Headlight circuit, with sealed beam headlamps

Horn circuit

5.7l (vin r), instrument cluster circuit

6.5l (vin s), instrument cluster circuit

Courtesy lamps circuit Instrument illumination circuit

Power distribution circuit

Door lock circuit, with crew cab or utility Keyless entry circuit, with crew cab or utility

Power mirror circuit

6-way power seat circuit Lumbar circuit, bench seat Lumbar circuit, bucket and split bench seat

Power window circuit, 2 door Power window circuit, 4 door

Radio circuits, with amplifier Radio circuits, without amplifier

Shift interlock circuit

Charging circuit Starting circuit

Supplemental restraint circuit

5.7l (vin r), transmission circuit, 4l60-e Transfer case circuit, with electronic shift control Transfer case circuit, without electronic shift control

6.5l (vin s), transmission circuit, 4l80-e Transfer case circuit, with electronic shift control Transfer case circuit, without electronic shift control

Rear glass release circuit

Warning system circuits

Front wiper/washer circuit Rear wiper/washer circuit

4 LOW SELECT SW IN 2 HI SELECT SW IN 4 HI SELECT SW IN BATTERY IN ANTI-LOCK BRAKES ANTI-LOCK BRAKES SYSTEM AUXILIARY BATTERY BATTERY FEED EVO SOL OUTPUT BATTERY IGNITION GROUND DEFOGGER ELEMENT BATTERY IN BATTERY STUD DIODE 1 FRONT WHEEL LOCK GROUND DOOR JAMB SW LOCK SIG UNLOCK SIG PPL HOLD- IN COIL HORN SLIP RING IGNITION COIL MODULE IGNITION FEED IGN TIMING SIG. IGN COIL OUT LEFT BATTERY LEFT HORN LIGHTS ON INPUT BATTERY INPUT KEY-IN WARNING LOCK LOCK OFF OFF LOCK OFF POWER AMPLIFIER PULL- IN COIL REMOTE BATTERY STUD REMOTE CONTROL DOOR LOCK RECEIVER RIGHT BATTERY RIGHT HORN SIR COIL ASSEMBLY SHORTING BAR VEHICLE IGNITION CONTROL COIL MODULE

79 CM FROM ENGINE HARNESS BREAK-OUT) "SERV ENG SOON" IND ENGINE SHUTOFF SOL OUT EGR SOL OUTPUT (ENGINE HARN, (ENGINE HARNESS, (RIGHT FRONT OF ENGINE (RIGHT SIDE OF ENGINE AUXILIARY COOLING FAN MOTOR BLOWER MOTOR ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM TRANSMISSION SYSTEM ENGINE CONTROLS SYSTEM ENGINE SHUTOFF FUEL SOLENOID SOLENOID DRIVER FORCE MOTOR FEED TRANS INPUT SPEED RTN TRANS INPUT SPEED SIG EST OUTPUT SIG FORWARD/ REARWARD MOTOR REAR TILT MOTOR FROM ENGINE HARN BREAKOUT) FRONT AXLE ACTUATOR FRONT MODE DOOR MOTOR FRONT TEMPERATURE DOOR MOTOR FRONT WINDSHIELD WASHER PUMP MOTOR FRONT WINDSHIELD WIPER/ WASHER PUMP MOTOR LEFT FRONT DOOR LOCK ACTUATOR LEFT FRONT WINDOW MOTOR LEFT POWER LUMBAR SUPPORT MOTOR LEFT REAR DOOR LOCK ACTUATOR LEFT REAR WINDOW MOTOR LEFT/ RIGHT MOTOR LIFTGATE RELEASE MOTOR POWER LUMBAR MOTOR PUMP MOTOR POWER PUMP MOTOR GROUND REAR AUXILIARY MODE DOOR MOTOR REAR AUXILIARY TEMP DOOR MOTOR REAR AUXILIARY TEMPERATURE DOOR MOTOR REAR BLOWER MOTOR REAR WINDOW WASHER PUMP MOTOR REAR WIPER MOTOR MODULE RECIRCULATION DOOR MOTOR RIGHT FRONT DOOR LOCK ACTUATOR RIGHT FRONT WINDOW MOTOR RIGHT POWER LUMBAR SUPPORT MOTOR RIGHT POWER POWER LEFT POWER LUMBAR MOTOR SEAT RIGHT REAR DOOR LOCK ACTUATOR RIGHT REAR WINDOW MOTOR SERVICE ENGINE SOON STARTER MOTOR STARTER MOTOR SOLENOID UP/ DOWN MOTOR WASTEGATE SOL ENGINE SHUTOFF SOL OUT WINDSHIELD RADIO WIPER MOTOR MODULE WINDSHIELD WIPER MOTOR MODULE

DOOR CONTACT BUTTON

AUXILIARY POWER CONNECTOR DATA LINK CONNECTOR FUEL PUMP PRIME CONNECTOR

CRUISE CONTROL MODULE DOOR LOCK CONTROL MODULE ELECTRONIC BRAKE CONTROL MODULE ELECTRONIC CONVENIENCE CENTER BRAKE CONTROL MODULE FRONT AUXILIARY A/C-HEATER CONTROL MODULE FRONT AUXILIARY HEATER-A/C CONTROL MODULE HEATER AND A/C CONTROL MODULE HVAC CONTROL MODULE INTERIOR LAMP CONTROL MODULE POWER STEERING CONTROL MODULE POWERTRAIN CONTROL MODULE REAR AUXILIARY A/C-HEATER CONTROL MODULE REAR AUXILIARY HEATER-A/C CONTROL MODULE REAR DOOR DOOR LOCK LOCK SWITCH CONTROL MODULE TRANSFER CASE CONTROL MODULE VEHICLE CONTROL MODULE

A/C COMP MINI FUSE A/C MAXI FUSE 3 A/C MAXI FUSE 3 MAXI FUSE 4 ABS MAXI FUSE 4 AIR BAG FUSE 10 AUX FAN MINI FUSE AUX PWR FUSE 7 AUX/PWR FUSE 7 BRAKE FUSE 18 BRAKE FUSE 18 STOP/HAZ FUSE 1 CIG LTR FUSE 13 CRANK FUSE 8 CRUISE FUSE 6 CTSY FUSE 3 DASH FUSE BLOCK DRL-FOG FUSE 15 DRL/FOG FUSE 15 ECM 1 FUSE ECM FUSE FUEL SOL FUSE ECM-1 MINI FUSE ECM-B FUSE ECM-B MINI FUSE ENG 1 FUSE ENG-1 MINI FUSE ENG-I FUSE FUEL SOL MINI FUSE ECM 1 MINI FUSE FUSE 24 FUSE BLOCK GAGES FUSE 4 GAUGES FUSE GAUGES FUSE 4 GLOW PLUGS FUSE HORN MINI FUSE HOT AT ALL TIMES I/P FUSE BLOCK CIG LTR FUSE 13 HOT IN RUN OR START A/C COMP MINI FUSE HOT IN RUN OR START GAUGES FUSE 4 HOT IN RUN OR START IGN MINI FUSE A/C COMP MINI FUSE HOT IN RUN OR START TURN/BU FUSE 16 HOT IN RUN, BULB TEST OR START GAUGES FUSE 4 HTR A/C FUSE 12 I/P FUSE BLOCK I/P FUSE BLOCK (LEFT SIDE OF DASH, I/P FUSE BLOCK CRANK FUSE 8 IGN E MINI FUSE ILLUM FUSE 14 LIGHTING FUSE 8 MAXI FUSE MAXI FUSE 2 MAXI FUSE 5 MAXI FUSE 6 MAXI FUSE 7 MAXI FUSE 8 PARK LPS FUSE 9 PK LPS FUSE PK LPS FUSE 9 RADIO BATT FUSE 19 RADIO FUSE 17 RR HVAC FUSE 5 RR WIPER FUSE 23 WIPER FUSE 11 RR WPR FUSE 23 RR-DEFOG MINI FUSE SECURITY FUSE 21 SECURITY/ STRG FUSE 21 STOP/ HAZ FUSE 1 STOP/HAZ FUSE 1 T CASE FUSE 2 TCASE FUSE 2 TRANS FUSE 20 TRANS FUSE 20 GAUGES FUSE 4 TURN B/U FUSE 16 WIPER FUSE 11

AUXILIARY HEATER AND A/C CONTROL LOGIC MODULE AUXILIARY HEATER- A/C LOGIC MODULE HEATER AND A/C CONTROL

"GLOW PLUGS" INDICATOR AIR BAG WARNING INDICATOR DRL INDICATOR FOUR-WHEEL DRIVE INDICATOR LAMP HIGH BEAM INDICATOR INSTRU- MENT CLUSTER SAFETY BELTS INDICATOR LOW COOLANT LEVEL INDICATOR MODULE MALFUNCTION INDICATOR LAMP ON INDICATOR SERVICE ENGINE SOON INDICATOR SERVICE THROTTLE SOON INDICATOR TACH CHARGE INDICATOR TRANSMISSIONS SYSTEM (FOUR WHEEL DRIVE INDICATOR CIRCUIT WATER IN FUEL INDICATOR

(REAR LAMP HARNESS, ASH TRAY LAMP BACKUP LIGHTS CIRCUIT BULB TEST CARGO LAMP CR LP CENTER HIGH MOUNT STOP LAMP CHECK GAUGES LAMP DRIVER FROM LICENSE LAMP BREAKOUT) FRONT DOME LAMP FRONT REAR DOME DOME LAMP LAMP HOT IN RUN, BULB TEST OR START I/P COMPARTMENT ASHTRAY LAMP LAMP I/P COMPARTMENT BOX LAMP I/P COMPARTMENT LAMP IGN ABS LAMP CONTROL BRAKE SW INPUT ILLUM LAMP ILLUM- NATION LAMP ILLUMINATION LAMP LAMP OUT LEFT BACKUP LAMP LEFT CLEARANCE LAMP LEFT FOG LAMP LEFT FRONT PARK/ TURN LAMP LEFT HEAD- LAMP RIGHT HEAD- LAMP LEFT I/P COURTESY LAMP LEFT LEFT REAR FRONT CLEARANCE CLEARANCE LAMP LAMP LEFT LICENSE LAMP TOWARD TAILLAMP BREAKOUT) LEFT LOW BEAM HEAD- LAMP LEFT HIGH BEAM HEAD- LAMP RIGHT HIGH BEAM HEAD- LAMP LEFT REAR TAIL, STOP, TURN, LEFT BACKUP LICENSE LAMP LAMPS LEFT TAIL, STOP, LEFT TURN, LICENSE BACKUP LAMPS LAMP LEFT TAIL/ STOP/ TURN LAMP LICENSE LAMP LICENSE LAMP BREAKOUT) REAR DOME LAMP RIGHT BACKUP LAMP RIGHT CLEARANCE LAMP RIGHT COURTESY LAMP RIGHT ENDGATE LICENSE MARKER LAMP LAMPS RIGHT FOG LAMP RIGHT FRONT DOOR COURTESY LAMP RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/ TURN LAMP RIGHT I/P COURTESY LAMP RIGHT LICENSE LAMP RIGHT LOW BEAM HEAD- LAMP RIGHT REAR DOOR COURTESY LAMP RIGHT RIGHT REAR FRONT CLEARANCE CLEARANCE LAMP LAMP RIGHT TAIL/ STOP/ TURN LAMP TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP TRANSFER CASE MODE SELECTOR ILLUMINATOR LAMP UNDER- HOOD LAMP UNDER- HOOD REEL LAMP UNDERHOOD LAMP UNDERHOOD LAMP PPL UNDERHOOD REEL LAMP UPSHIFT LAMP VSS SIG SERIAL DATA LINE SERIAL DATA LINE BRAKE LAMP CONTROL EBCM GROUND VSS SIG SERIAL DATA LINE SERIAL DATA SIGNAL BRAKE LAMP CONTROL EBCM GROUND

BALANCE FUEL FUEL PUMP GAGE BALANCE SENDER MODULE BALANCE FUEL PUMP ELECTRONIC INJECTION PUMP FUEL LIFT PUMP FUEL PUMP AND SENDER FUEL PUMP BALANCE MODULE FUEL PUMP RLY CTRL 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FUEL PUMP/ SENDER

5 CM FROM TRANSFER CASE RELAY BREAKOUT FROM AXLE SWITCH) 592 592 150 DRL RELAY CTRL A/C CLUTCH RELAY A/C COMPRESSOR CLUTCH RELAY A/C RELAY AIR INJECTION REACTION SECONDARY RELAY AUX FAN RELAY MINI FUSE AUXILIARY COOLING FAN RELAY BLOWER LOW RELAY BLOWER RELAY BRAKE LAMP RELAY UNDERHOOD FUSE-RELAY CENTER DAYTIME AUDIO RUNNING ALARM MODULE LAMPS RELAY DAYTIME LEFT RUNNING COURTESY LAMPS LAMP RELAY DAYTIME RUNNING LAMPS RELAY DOOR LOCK RELAY DOOR REMOTE CONTROL LOCK DOOR LOCK RELAY RECEIVER EVAPORATIVE FUEL EMISSIONS PUMP CANISTER PURGE BALANCE SOLENOID VALVE RELAY FOG LAMP RELAY FUEL PUMP RELAY FUEL PUMP RELAY UNDERHOOD FUSE-RELAY CENTER FUEL PUMP, OIL PRESS SWITCH/ SENDER, FUEL PUMP RELAY HIGH BLOWER MOTOR RELAY HORN RELAY HOT AT ALL TIMES UNDERHOOD FUSE-RELAY CENTER HOT IN RUN OR START UNDERHOOD FUSE/RELAY CENTER ECM 1 FUSE INTAKE MAN AIR TEMP SENS APP 2 SIG GLOW PLUG RELAY FORCE MTR LOW LEFT FRONT RIGHT FRONT POWER DOOR LOCK DOOR LOCK AMPLIFIER SWITCH SWITCH RELAY POWER AMPLIFIER RELAY POWER FUEL STEERING PUMP CONTROL RELAY MODULE REAR HIGH BLOWER RELAY REAR LOW BLOWER RELAY REAR REAR MEDIUM AUXILIARY BLOWER MODE DOOR RELAY MOTOR RELAY CTRL SOLID STATE TIME DELAY RELAY SPARE POWER SOURCE AUXILIARY BATTERY RELAY SPARE POWER SOURCE STARTER RELAY STARTER RELAY UNDERHOOD FUSE-RELAY CENTER STOPLAMP RELAY STOPLAMP STARTER RELAY RELAY TRANSFER CASE RELAY TRANSFER CASE RELAY BREAKOUT) UNDER HOOD FUSE-RELAY CENTER UNDERHOOD FUSE- RELAY CENTER A/C COMPRESSOR CLUTCH RELAY UNDERHOOD FUSE-RELAY CENTER UNDERHOOD FUSE-RELAY CENTER HORN MINI FUSE UNDERHOOD FUSE/RELAY CENTER VSS SIG OUT VSS SIG OUT CHECK ENG LP CTRL AUX FAN RELAY 389 419

A/T ISS SENSOR OUT AIR TEMP DR SENSOR MODE SIGNAL BOOST PRESSURE SENSOR CAMSHAFT EXHAUST POSITION GAS SENSOR RECIRCULATION VALVE ECT SENSOR IN ECT TEMP SENS IN BARO SENSOR INPUT FUEL EGR GLOW WATER-IN- HEATER VENT PLUG FUEL SOLENOID CONTROL SENSOR MODULE FUEL TEMPERATURE SENSOR HEATED HEATED MASS OXYGEN OXYGEN AIRFLOW SENSOR 1 SENSOR 2 SENSOR HEATED HEATED OXYGEN OXYGEN SENSOR 4 SENSOR 3 HEATED OXYGEN SENSOR BANK 1 SENSOR 1 HEATED OXYGEN SENSOR BANK 1 SENSOR 2 HEATED OXYGEN SENSOR BANK 2 SENSOR 1 HEATED OXYGEN SENSOR BANK 2 SENSOR 2 IGNITION CRANK- CONTROL SHAFT MODULE POSITION SENSOR IGNITION CRANK- FUEL CONTROL SHAFT INJECTOR MODULE POSITION SENSOR INFLATABLE RESTRAINT FRONT END SENSOR LEFT FRONT WHEEL SPEED SENSOR LOW GLOW COOLANT PLUG LEVEL RELAY SENSOR MASS AIR FLOW SENSOR MASS AIRFLOW SENSOR PNK PPL IGNITION SRL DATA CLASS 13 SENSOR RETURN 5 VOLT REF WIRE PPL SENSOR RETURN VSS RTN VSS SIGNAL CRANK POSIT SENS SIG RIGHT FRONT WHEEL SPEED SENSOR SENSOR GND SENSOR GROUND SENSOR RETURN SENSOR SIGNAL SPEED SENSOR SPEED STOPLAMP/ VCM SENSOR CLUTCH SIG INPUT SWITCH INPUT TFT SENSOR IN TRANS FLUID TEMP SENSOR TRANSMISSION TEMPERATURE SENSOR VALVE CTRL AIR TEMP DR SENSOR MODE SIGNAL A/C SWITCH VEHICLE SPEED SENSOR VEHICLE SPEED SENSOR ADAPTOR VEHICLE SPEED SENSOR BUFFER WATER IN-FUEL SENSOR WATER-IN- FUEL FUEL HEATER SENSOR

LEFT FRONT SPEAKER LEFT REAR DOOR SPEAKER LEFT REAR SPEAKER RIGHT FRONT SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR SPEAKER

A/C COMPRESSOR CYCLING SWITCH A/C LOW PRESSURE SWITCH BACKUP LAMP SWITCH BELT SWITCH BREAKOUT) BLOWER SWITCH BRAKE PRESSURE WARNING SWITCH BRAKE SWITCH IN BRAKE SWITCH INPUT CARGO LAMP SWITCH CRUISE CONTROL SWITCH ENDGATE WINDOW RELEASE SWITCH EVAPORATIVE EMISSIONS PURGE VACUUM SOLENOID SWITCH FOG LAMP SWITCH FOG LAMP SWITCH CARGO LAMP SWITCH FRONT AXLE SWITCH FUEL PUMP OIL PRESSURE SWITCH AND SENDER GROUND GROUND BATTERY IN BATTERY IN PNP SWITCH OUT HEAD- LAMP DIMMER SWITCH HEADLAMP AND PANEL DIMMER SWITCH HEADLAMP AND PANEL DIMMER SWITCH DOME LAMP DEFEAT COURTESY LAMPS HEADLAMP, PANEL DIMMER SWITCH HEATER AND A/C CONTROL SWITCH HIGH A/C PRESSURE CUTOUT SWITCH HORN SWITCH IGNITION PRESSURE SWITCH INPUT PRESSURE SWITCH INPUT IGNITION STEERING SWITCH COLUMN GROUND GROUND IGNITION SWITCH INFLATABLE RESTAINT I/P MODULE ENABLE SWITCH INFLATABLE RESTRAINT I/P MODULE ENABLE SWITCH KEY-IN WARNING BUZZER SWITCH LEFT DOOR JAMB SWITCH LEFT DOOR LOCK SWITCH LEFT FRONT DOOR JAMB SWITCH LEFT FRONT DOOR LOCK SWITCH LEFT FRONT POWER WINDOW LOCK SWITCH LEFT FRONT POWER WINDOW MASTER SWITCH LEFT FRONT POWER WINDOW SWITCH LEFT POWER LUMBAR SUPPORT SWITCH LEFT POWER WINDOW MASTER SWITCH LEFT REAR DOOR JAMB SWITCH LEFT REAR POWER WINDOW SWITCH LEFT REAR REAR POWER WINDOW WINDOW LOCKOUT SWITCH SWITCH LEFT REAR WINDOW SWITCH PARK BRAKE WARNING SWITCH PARK/ NEUTRAL POSITION SWITCH POWER OUTSIDE REARVIEW MIRROR SWITCH POWER SEAT SWITCH PPL BRAKE PRESSURE WARNING SWITCH PPL PPL 420 1807 950 BRAKE SWITCH INPUT SERIAL DATA SIG VCM GROUND IGNITION PRESSURE SWITCH INPUT RADIO INFLATABLE RESTAINT I/P MODULE ENABLE SWITCH REAR AUXILIARY HEATER SWITCH REAR DEFOGGER SWITCH REAR DOOR JAMB SWITCH REAR LIFTGATE RELEASE SWITCH REAR WINDOW LOCKOUT SWITCH REAR WINDOW WIPER/ WASHER SWITCH REMOTE OUTSIDE REARVIEW MIRROR SWITCH RIGHT DOOR LOCK SWITCH RIGHT FRONT DOOR JAMB SWITCH RIGHT FRONT DOOR LOCK SWITCH RIGHT FRONT POWER LUMBAR SEAT SWITCH RIGHT FRONT POWER WINDOW SWITCH RIGHT FRONT WINDOW SWITCH RIGHT POWER LUMBAR SUPPORT SWITCH RIGHT REAR DOOR JAMB SWITCH RIGHT REAR POWER WINDOW SWITCH RIGHT REAR WINDOW SWITCH SEAT BELT SWITCH SEAT BELT SWITCH BREAKOUT) STOPLAMP SWITCH IN SWITCH SIGNAL TCC/ STOPLAMP SWITCH TCC/STOPLAMP SWITCH TRANS RANGE PRESSURE SWITCH ASSEMBLY TRANSFER CASE SELECT SWITCH TRANSFER SPARE CASE POWER SELECT SOURCE SWITCH TURN SIGNAL SWITCH TURN/ HAZARD SWITCH TURN/ HAZARD SWITCH, CHIME MODULE WASHER SWITCH WINDOW LOCKOUT SWITCH WINDSHIELD WIPER/ WASHER SWITCH WIPER SWITCH

1-2 SHIFT SOLENOID 2-3 1-2 SHIFT SHIFT SOLENOID SOLENOID 2-3 SHIFT SOLENOID 3-2 CTRL SOLENOID 3-2 TCC SHIFT SOLENOID SOLENOID 3/2 SHIFT SOL. PRESSURE CONTROL SOLENOID VALVE "SERV THROTTLE SOON" IND EGR VALVE SOL PUTPUT EGR SOLENOID FUEL SOLENOID PRESS CTRL HI SOLENOID LO PRESS CTRL SOLENOID LO PRESSURE CONTROL SOLENOID VALVE STARTER SOLENOID TCC PWM SOLENOID TCC SOLENOID TORQUE CONVERTOR CLUTCH PULSE WIDTH MODULATION SOLENOID WASTEGATE SOLENOID

4.3L PNK WIRE 5 6 7 PNK WIRE 14 15 16 PNK WIRE 1134 1134 39 10 10 PARK BRAKE SIG IND BULB CHK IGNITION LAMP FEED PNK WIRE A/T PNK WIRE BLK WIRE BLK/GRY WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CAM POSIT SENS SIG IGNITION INJ NO.8 CTRL PNK WIRE DIESEL ONLY PNK WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK PNK WIRE GRN WIRE GRY WIRE GRY/BLK WIRE HIGH VOLTAGE COIL WIRE LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE LT PNK WIRE M/T A/T PNK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK IGN ON WIRE PNK IGN WIRE PNK IGNITION FEED WIRE PNK IGNITION FOUR WHL DR SIG WIRE PNK IGNITION IN ENCODER GROUND GROUND 2 HI INDIC CTRL 4 HI INDIC CTRL WIRE PNK IGNITION WIRE PNK LEFT POWER LUMBAR SUPPORT MOTOR WIRE PNK LT PPL/ WIRE PNK PNK 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 WIRE PNK PNK 8 9 WIRE PNK PNK 439 439 IGNITION IGNITION WIRE PNK PNK PNK 1 2 3 4 WIRE PNK PNK PNK PNK PNK PNK PNK 1 2 3 4 5 6 7 8 9 WIRE PNK PNK PNK PNK PNK PNK PNK WIRE PNK PNK PNK PNK PNK WIRE PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RUN WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSFER CASE CIRCUIT PNK WIRE TURN/ HAZARD SWITCH PNK WIRE WHT TAN/ WIRE WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 RR+ RR- 1 2 3 4 5 6 7 8 9 10 ILLUMINATION GROUND 1 2 3 4 5 6 7 8 9 10 ILLUMINATION GROUND A/C DISABLE AUX FAN CTRL IGNITION 1-2 SHIFT SOL 1-2 SHIFT SOL. CTRL TCC SOL CTRL 2-3 SHIFT SOL 2-HI IND 2-HI SW 3 2 PPL 3-2 DOWNSHIFT SOL 4 LO INDIC CTRL 4 LO SW 4-DOOR TRUCKS ONLY 4-HI IND 4-HI SW 4-LO IND 4-SPEED TRANS. ONLY 4.3L 4.3L ONLY 5 15 4 MIL IND UPSHIFT IND SPEEDO 5 CM FROM TRANSFER CASE BREAKOUT) 5 VOLT REF 6-WAY POWER SEAT CIRCUIT 7 8 9 10 12 13 14 15 VSS RTN GROUND 7.4L 6.5L 7.4L W/ CALIFORNIA EMISSIONS OTHERS 16 PPL 23 24 FOUR WHL DR SIG LO CRUISE CTRL SIG ENG 27 28 29 30 31 PPL 29 30 VSS VSS 33 33 BRAKE IND CTRL BRAKE WARN IN 260 (CROSS BODY HARNESS, 260 (CROSSBODY HARNESS, 900 900 SERVICE CIRCUIT POWER SERVICE CIRCUIT POWER 1226 1225 RANGE MODE SEL C RANGE MODE SEL B RANGE MODE SEL A 4000 PULSES/MILE CRUISE STATUS (14 GA- (CROSSBODY HARN, (CROSSBODY HARN, APPROX (CROSSBODY HARNESS, (CROSSBODY HARNESS, APPROX 8 CM RIGHT OF I/P CLUSTER CONVENIENCE CENTER (FORWARD LAMPS (FORWARD LAMPS HARN, APPROX (FORWARD LAMPS HARNESS, (FWD LAMPS HARN, (HVAC HARNESS, (I/P HARN, (I/P HARN, APPROX (LEFT SIDE OF (REAR LAMPS HARN, A/C COMPRESSOR CLUTCH A/C CTRL A/C ENABLE PCM GND PCM GND A/C REQ A/C REQUEST SIG A/C REQUEST SIGNAL A/C SYSTEM A/T ISS SENS HI IN A/T ISS SENS IN A/T ISS SENS LO IN A/T M/T A/T ONLY A/T OR A/T PPL PPL PPL PPL M/T ABS IND. AIR BAG AIR BAG DAYTIME RUNNING LAMPS AIR CONDITIONING SYSTEM APP 1 SIGNAL IN APP 2 SIGNAL IN APP 3 SIGNAL IN AUDIO ALARM MODULE AUTOMATIC TRANSMISSION AUX FAN CTRL BACK FOR- WARD BALANCE FUEL GAGE SENDER BAT WAIT TO BENCH OTHERS SEAT BRAKE APPLIED INPUT BRAKE IND BRAKE IND IN BRAKE SW OUTPUT BREAKOUT TO EBCM) BTSI GROUND CAB CLEARANCE LAMPS CENTER HIGH MOUNT STOPLAMP CH- MSL LP CHANNEL A CHANNEL B CHANNEL C CHANNEL P CHARGING CIRCUIT CHASSIS CAB, HEAVY DUTY CHECK GAUGES CIGAR LIGHTER CLASS II DATA CLUSTER BREAKOUT) CLUSTER BREAKOUT; 1998 DIESEL) CMP SIG COLUMN HARNESS BREAKOUT) COMPUTER DATA LINES SYSTEM CONVENIENCE CENTER CONVENIENCE CONVENIENCE CENTER CENTER COOLING FANS SYSTEM CRUISE CONTROL SYSTEM CRUISE INSTRUMENT CONTROL CLUSTER MODULE CRUISE ON INPUT CRUISE ON INPUT SET/COAST INPUT RESUME/ACCEL INPUT CRUISE STATUS VEHICLE SPEED INPUT DATA CLASS II DAYTIME RUNNING LAMPS DAYTIME RUNNING LAMPS MODULE DIESEL EXCEPT DIESEL DIESEL GAS DIESEL GASOLINE DIESEL ONLY DISENGAGE INPUT DISENGAGE INPUT GROUND IGNITION BRAKE APPLIED INPUT DISPLAY DIM SIG DISPLAY DISPLAY DIM DIM SIG SIG DK PPL DLC CONTROL DOME DEFEAT DOOR BREAKOUT) DOOR JAMB DOWN DOWN ECT SENS INPUT ELECTROCHROMATIC MIRROR W/ COMPASS ELECTROCHROMIC REARVIEW MIRROR W/ COMPASS ENTIRE SEAT ENTIRE SEAT DOWN ENTIRE SEAT UP EVAP SOL PURGE CTRL SHIFT SOL. CTRL EVAPORATIVE EMISSION CANISTER VENT EVO SOL FEED EX DIESEL EXCEPT 4.3L EXCEPT CHASSIS CAB, HEAVY DUTY EXCEPT DIESEL DIESEL FAN REQ FRONT DOME/ READING LAMPS FUEL FUEL FUEL INJECTOR INJECTOR INJECTOR FUEL FUEL INJECTOR INJECTOR FUEL GAGE SENDER FUEL GAUGE FUEL INJ. NO.1 FUEL INJ. NO.2 FUEL INJ. NO.3 FUEL INJ. NO.4 FUEL INJ. NO.5 FUEL INJ. NO.6 FUEL INJ. NO.7 FUEL INJ. NO.8 FUEL INJECTOR FUSIBLE LINK FUSIBLE LINKS GASOLINE DIESEL 5.0L, 5.7L 4.3L GLOW GLOW PLUG 5 PLUG 7 GLOW GLOW PLUG 6 PLUG 4 GLOW PLUG 1 GLOW PLUG 2 GLOW PLUG 3 GLOW PLUG 8 GLOW PLUG OUTPUT HAZARD NORMAL HEAD OFF PARK HEADLAMP BREAKOUT) HEADLAMP BREAKOUT) PPL HEADLIGHTS SYSTEM HEAVY DUTY ELECTRONIC 4-SPD AUTOMATIC OVERDRIVE TRANSMISSION HI BEAM HI LO HI MIST LO OFF INST WIPE PULSE HI PPL HIGH RES SIG HOT AT ALL TIMES HOT AT ALL TIMES FUSIBLE LINK HOT AT ALL TIMES PWR ACCY CIRCUIT BREAKER HOT IN HOT IN ACC OR RUN HOT IN ACCY OR RUN HOT IN OFF, RUN OR START HOT IN PARK OR HEAD HOT IN PARK OR HEADLAMP HOT IN RUN HOT IN RUN OR START HOT IN RUN, START HOT WITH HEADLAMP SW IN PARK OR HEAD IGN BRAKE INPUT INPUT INPUT SW INPUT IGN SENS SENS FEED RTN SIG IGN SW IGNITION IN INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE INFLATABLE RESTRAINT STEERING WHEEL MODULE INJ NO.1 CTRL 2-3 SHIFT SOL. CTRL INPUT FUEL GAUGE INPUT OIL GAUGE INPUT TACHOMETER INSTRU- MENT CLUSTER RIGHT TURN INDIC INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM KNOCK SENS SIG LED DIMMING LEFT CARGO DOOR DEFOGGER GRID LEFT DOOR HARN BREAKOUT) LEFT FRONT LEFT FRONT FENDER) LEFT FRONT PARK/ TURN LAMPS LEFT FRONT TWEETER LEFT HEADLAMP BREAKOUT) LEFT HIGH/ LOW BEAM HEADLAMP LEFT ILLUMINATED VANITY MIRROR LEFT LEFT HIGH LOW BEAM BEAM HEADLAMP HEADLAMP LEFT OUTSIDE POWER REARVIEW MIRROR LEFT POWER SEAT LEFT REAR LEFT REAR FENDER LEFT REAR TAIL, STOP, LICENSE, TURN, BACKUP LAMPS LEFT TURN LEFT TURN INDIC LEFT TURN RIGHT TURN LH RH LICENSE LAMPS LIFTGATE UNLOCK LOW COOLANT LR DR - RLY SIG GROUND LR DR + LR+ LR- RR DR + LT LT LT VSS LUMBAR SUPPORT CIRCUIT M/T A/T M/T ONLY PPL MAP SENS INPUT FORCE MTR HI MAP SENS INPUT IAT SENS SIG ECT SENS SIG THROTTLE POSIT SENS 472 410 MIL CONTROL MIRRORS SYSTEM MIST OFF INST WIPE MULTIFUNCTION LEVER NOTE: FUEL INJECTORS ARE LOCATED IN CENTRAL SFI, CENTER OF INTAKE MANIFOLD OFF LO OIL GAUGE OIL PRESS OR 379 451 OVERHEAD CONSOLE LAMPS PARADE MODE SW PARITY PRNDL PARK NEUTRAL SIGNAL PCM GROUND PCS SOL HI OUT PCS SOL LO OUT PICK-UP W/ EXTENDED OR CREW CAB PICKUP W/ DUAL REAR WHEELS PICKUP/ EXTENDED CAB ONLY PLATFORM HITCH GROUND POS SIG VOLT OUT REF POSITION SIGNAL VSS SIGNAL INPUT POWER DISTRIBUTION SYSTEM POWER POWER OUTLET OUTLET POWER WDO CIRCUIT BREAKER PPL (OR PPL A/T M/T PPL DATA CLSS 2 PPL OUTPUT TO GAGE PRIMARY TANK FUEL LEVEL SIGNAL PPL PPL PPL PPL 420 OR PRNDL A PRNDL B PRNDL C PROG ENABLE PWR ACCY C.B. PWR WDO CIRCUIT BREAKER PWR-ACCY CIRCUIT BREAKER RANGE SIGNAL "A" RANGE SIGNAL "B" RANGE SIGNAL "C" REAR CLEARANCE LAMPS CIRCUIT REAR DEFOGGER SYSTEM REAR DOME READING LAMPS REAR HEIGHT FRONT HEIGHT FRONT HEIGHT REAR LIFTGATE WINDOW DEFOGGER GRID REAR LIFTGATE WINDOW RELEASE CIRCUIT REAR WINDOW DEFOGGER GRID RECIRC CTRL IGNITION RECIRC DOOR BREAKOUT) REMOTE AUDIO PLAYER RESUME/ACCEL INPUT RHEO- REAR CLEARANCE LAMPS CIRCUIT STAT RHEO- STAT RIGHT CARGO DOOR CONTACTOR LEFT CARGO DOOR CONTACTOR RIGHT CARGO DOOR DEFOGGER GRID RIGHT FRONT RIGHT FRONT PARK/ TURN LAMPS RIGHT FRONT TWEETER RIGHT HEADLAMP BREAKOUT) RIGHT HIGH BEAM HEADLAMP RIGHT HIGH/ LOW BEAM HEADLAMP RIGHT ILLUMINATED VANITY MIRROR RIGHT LOW BEAM HEADLAMP RIGHT OUTSIDE POWER REARVIEW MIRROR RIGHT REAR RIGHT REAR CARGO DOOR DEFOGGER GRID LEFT REAR CARGO DOOR DEFOGGER GRID RIGHT REAR FENDER RIGHT REAR TAIL, STOP, LICENSE, TURN, BACKUP LAMPS RIGHT REAR TAIL, STOP, TURN, BACKUP LAMPS RIGHT TAIL, STOP, TURN, BACKUP LAMPS RIGHT TURN ROOF MARKER LAMPS RR DR - S/C DK SAFETY BELT SEAT BELT INPUT GROUND FASTEN BELTS OUT SEAT BELT SW BREAKOUT TOWARD I/P HARN BREAKOUT) SENS GRD SERIAL DATA SERIAL DATA VSS SIGNAL RR - RR + LR _ LR + SERVICE THROTTLE SOON UP- SHIFT SET- SET/COAST INPUT SHIFT IND LP OUT SHIFT SOL. SHIFT SOL. SHORTING BAR SOLID STATE SPEED- OMETER SPEEDOMETER INPUT STARTING CIRCUIT STARTING/CHARGING SYSTEM STEERING WHEEL) SUBURBAN ONLY SUBURBAN, UTILITY ONLY SUBURBAN/ UTILITY SUBURBAN/ UTILITY PICKUP SUBURBAN/UTILITY W/ LIFTGATE SUBURBAN/UTILITY W/O LIFTGATE SUPPLEMENTAL RESTRAINTS SUPPLEMENTAL RESTRAINTS SYSTEM TCC PWM SOL TCC SOL TCC SOL. CTRL TEMP GAUGE TP SENS INPUT TRAILER HARNESS BREAKOUT) TRANS RANGE "A" TRANS RANGE "B" TRANS RANGE "C" TRANS RANGE SWITCHES TRANS TEMP SIG IN TRANS- MISSION TRANS- MISSION CIRCUIT TRANS.) TRANSFER CASE SYNCHRONIZER TRANSFER CASE, AXLE SWITCHES TRANSMISSION SPEED INPUT TRANSMISSION TEMP INPUT TRANSMISSIONS SYSTEM TRUNK, TAIL- GATE, FUEL DOORS SYSTEM TURN PWR HAZ PWR FLSHR OUT GND TURN/ HAZARD FLASHER TWISTED PAIR UART DATA UP DOWN UP REAR HEIGHT UP UP UTILITY ONLY UTILITY W/ REAR CARGO DOORS UTILITY W/ REAR LIFT GATE/WINDOW VEHICLE SPEED INPUT VEHICLE SPEED SIG VOLT- METER VOLTMETER SPEEDOMETER VSS HI VSS HI IN VSS IN VSS LO VSS LO IN VSS OUT VSS RETURN VSS SIG VSS SIG VSS SIG VSS HI VSS OUTPUT VSS OUTPUT VSS SIGNAL W/ DUAL FUEL TANKS W/O DUAL FUEL TANKS W/ DUAL HORNS W/ DUAL REAR WHEELS W/ DUAL TANKS W/ ELECTRIC SHIFT TRANSFER CASE W/ FOG LAMPS W/ RKE W/ STEP BUMPER W/BENCH SEAT W/DUAL FUEL TANKS W/DUAL FUEL TANKS W/O DUAL FUEL TANKS W/DUAL TANKS W/O BENCH SEAT W/O DUAL FUEL TANKS W/O DUAL FUEL TANKS W/DUAL FUEL TANKS W/O DUAL TANKS W/O POWER WINDOWS W/ POWER WINDOWS W/O RKE W/O STEP BUMPER WAIT TO WARNING SYSTEM WARNING SYSTEMS WASH OFF WATER IN FUEL