GMC Yukon I (1991-1999) dk blu/wht Wiring diagrams

29 30 VSS VSS 5 15 4 MIL IND UPSHIFT IND SPEEDO ACCY AIR BAG DAYTIME RUNNING LAMPS ANTI-LOCK BRAKES ANTI-LOCK BRAKES SYSTEM BALANCE FUEL GAGE SENDER (IN REAR FUEL TANK) BLK WIRE BLK/WHT WIRE BRAKE IND IN BRAKE PRESSURE MODULATOR VALVE (LEFT FRONT WHEELHOUSE) 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 DAYTIME RUNNING LAMPS MODULE (LEFT SIDE OF I/P) DIODE 1 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE COOLANT TEMPERATURE SENDER (LEFT CYLINDER HEAD) FUEL GAUGE FUEL PUMP BALANCE MODULE (NEAR TRANSMISSION CROSSMEMBER) FUEL PUMP, SENDER (IN FRONT FUEL TANK) FUEL PUMP, SENDER (IN FUEL TANK) FUEL PUMP/ OIL PRESSURE SWITCH, SENDER (LEFT REAR SIDE OF ENGINE) GRY WIRE HEADLIGHTS SYSTEM HI BEAM HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGN IGN E MINI FUSE IGNITION COIL (RIGHT REAR SIDE OF ENGINE) IGNITION SWITCH ILLUM ILLUMINATION INSTRUMENT CLUSTER LED DIMMING LEFT TURN LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PNK WIRE OIL GAUGE PARITY PRNDL PARK BRAKE WARNING SWITCH (LEFT SIDE OF I/P) PNK WIRE PPL PPL PPL PPL/WHT WIRE PRNDL PRNDL A PRNDL B PRNDL C RIGHT TURN RUN WIRE SAFETY BELT SERVICE ENGINE SOON STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACH TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEMP GAUGE TRANS FUSE 20 GAUGES FUSE 4 TRANSMISSION RANGE SELECTOR (LEFT SIDE OF TRANSMISSION) TWISTED PAIR UNDERHOOD FUSE-RELAY CENTER UNDERHOOD FUSE-RELAY CENTER (LEFT REAR OF ENGINE COMPT) UPSHIFT (M/T ONLY) VEHICLE CONTROL MODULE (LEFT FRONT WHEELHOUSE) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VOLTMETER SPEEDOMETER W/ DUAL FUEL TANKS W/O DUAL FUEL TANKS WARNING SYSTEMS WHT TAN/ WIRE WHT WIRE YEL WIRE

ACCY ANTI-LOCK BRAKES SYSTEM BALANCE FUEL GAGE SENDER (IN REAR FUEL TANK) BLK WIRE BLK/WHT WIRE BRAKE IND IN BRAKE PRESSURE MODULATOR VALVE (LEFT FRONT WHEELHOUSE) BRAKE PRESSURE WARNING SWITCH (ON REAR OF BRAKE PRESSURE MODULATOR VALVE BODY) BRN WIRE BULB TEST DAYTIME RUNNING LAMPS MODULE (LEFT SIDE OF I/P) DIODE 1 DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENG-1 MINI FUSE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE CONTROLS SYSTEM TRANSMISSION SYSTEM ENGINE CONTROLS SYSTEM FUEL GAGE SENDER FUEL PUMP/ SENDER GAUGES FUSE 4 HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGN E MINI FUSE IGNITION SWITCH LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PARK BRAKE WARNING SWITCH (LEFT SIDE OF I/P) PNK PNK WIRE PNK WIRE PPL PPL/WHT WIRE RADIO RUN WIRE TAN/WHT WIRE TRANS FUSE 20 TWISTED PAIR UNDERHOOD FUSE-RELAY CENTER (LEFT REAR OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT SIDE OF I/P) W/ DUAL FUEL TANKS W/O DUAL FUEL TANKS WHT TAN/ WIRE WHT WIRE

2-HI IND 2-HI SW 4 LO INDIC CTRL 4 LO SW 4 LOW SELECT SW IN 2 HI SELECT SW IN 4 HI SELECT SW IN BATTERY IN 4-HI IND 4-HI SW 4-LO IND 5 CM FROM TRANSFER CASE RELAY BREAKOUT FROM AXLE SWITCH) 79 CM FROM ENGINE HARNESS BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CHANNEL A CHANNEL B CHANNEL C CHANNEL P DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DIESEL DK BLU/WHT WIRE DK GRN/WHT WIRE FRONT AXLE ACTUATOR FRONT AXLE SWITCH FRONT AXLE SWITCH (RIGHT REAR OF FRONT DRIVE AXLE) FUSE 24 GASOLINE GAUGES FUSE 4 GROUND GROUND GROUND BATTERY IN BATTERY IN PNP SWITCH OUT GRY WIRE GRY/BLK WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) ILLUMINATION LAMP LT BLU WIRE LT GRN WIRE ORG (OR LT GRN/BLK) WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE, CENTER OF TRANSMISSION) PNK IGNITION IN ENCODER GROUND GROUND 2 HI INDIC CTRL 4 HI INDIC CTRL WIRE PNK WIRE POWERTRAIN CONTROL MODULE (DIESEL) PPL/WHT WIRE REAR LIFTGATE WINDOW RELEASE CIRCUIT RED WIRE RED/WHT WIRE SPARE POWER SOURCE AUXILIARY BATTERY RELAY SPARE POWER SOURCE TAN/BLK WIRE TCASE FUSE 2 TCC/STOP LAMP SWITCH (TOP OF BRAKE PEDAL) TRANS- MISSION CIRCUIT TRANSFER CASE CONTROL MODULE (STEERING COLUMN BRACKET) TRANSFER CASE ENCODER (LEFT SIDE CENTER OF TRANSFER CASE) TRANSFER CASE ENCODER MOTOR (LEFT SIDE OF TRANSFER CASE) TRANSFER CASE RELAY (1-TON VEHICLES ONLY) (RIGHT SIDE OF FIREWALL) TRANSFER CASE SELECT SWITCH TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER (TOP OF TRANSFER CASE) TURN B/U FUSE 16 TURN SIGNAL SWITCH WHT WIRE YEL WIRE YEL/BLK WIRE

2-HI IND 2-HI SW 4 LO INDIC CTRL 4 LO SW 4 LOW SELECT SW IN 2 HI SELECT SW IN 4 HI SELECT SW IN BATTERY IN 4-HI IND 4-HI SW 4-LO IND 5 CM FROM TRANSFER CASE RELAY BREAKOUT FROM AXLE SWITCH) 79 CM FROM ENGINE HARNESS BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CHANNEL A CHANNEL B CHANNEL C CHANNEL P DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DIESEL DK BLU/WHT WIRE DK GRN/WHT WIRE FRONT AXLE ACTUATOR FRONT AXLE SWITCH FRONT AXLE SWITCH (RIGHT REAR OF FRONT DRIVE AXLE) FUSE 24 GASOLINE GAUGES FUSE 4 GROUND GROUND GROUND BATTERY IN BATTERY IN PNP SWITCH OUT GRY WIRE GRY/BLK WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) ILLUMINATION LAMP LT BLU WIRE LT GRN WIRE ORG (OR LT GRN/BLK) WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE, CENTER OF TRANSMISSION) PNK IGNITION IN ENCODER GROUND GROUND 2 HI INDIC CTRL 4 HI INDIC CTRL WIRE PNK WIRE POWERTRAIN CONTROL MODULE (DIESEL) PPL/WHT WIRE REAR LIFTGATE WINDOW RELEASE CIRCUIT RED WIRE RED/WHT WIRE SPARE POWER SOURCE AUXILIARY BATTERY RELAY SPARE POWER SOURCE TAN/BLK WIRE TCASE FUSE 2 TCC/STOP LAMP SWITCH (TOP OF BRAKE PEDAL) TRANS- MISSION CIRCUIT TRANSFER CASE CONTROL MODULE (STEERING COLUMN BRACKET) TRANSFER CASE ENCODER (LEFT SIDE CENTER OF TRANSFER CASE) TRANSFER CASE ENCODER MOTOR (LEFT SIDE OF TRANSFER CASE) TRANSFER CASE RELAY (1-TON VEHICLES ONLY) (RIGHT SIDE OF FIREWALL) TRANSFER CASE SELECT SWITCH TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER (TOP OF TRANSFER CASE) TURN B/U FUSE 16 TURN SIGNAL SWITCH WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL. CTRL TCC SOL CTRL A/C COMPRESSOR CLUTCH RELAY BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CAM POSIT SENS SIG IGNITION INJ NO.8 CTRL PNK WIRE CAMSHAFT POSITION SENSOR (IN DISTRIBUTOR) COIL DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DK PNK WIRE EVAP SOL PURGE CTRL SHIFT SOL. CTRL GRN WIRE GRY WIRE IGN SENS SENS FEED RTN SIG INJ NO.1 CTRL 2-3 SHIFT SOL. CTRL KNOCK SENS SIG LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE LT LT MAP SENS INPUT IAT SENS SIG ECT SENS SIG THROTTLE POSIT SENS 472 410 NCA WIRE PNK IGNITION FEED WIRE PNK LT PPL/ WIRE PNK PNK PNK PNK PNK PNK PNK 1 2 3 4 5 6 7 8 9 WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK WIRE PPL PPL PPL SENSOR RETURN VSS RTN VSS SIGNAL CRANK POSIT SENS SIG PPL/WHT WIRE RED/BLK WIRE RIGHT SENS LO (PRECAT) SENS RTN SENSOR RETURN SENSOR SIGNAL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL. CTRL UNDERHOOD FUSE-RELAY CENTER VSS SIG WHT WIRE YEL WIRE YEL/BLK WIRE

14 15 16 PNK WIRE 2-3 1-2 SHIFT SHIFT SOLENOID SOLENOID 3-2 TCC SHIFT SOLENOID SOLENOID 4-SPEED TRANS. ONLY 5 6 7 PNK WIRE AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE ECM-1 MINI FUSE ENG-1 MINI FUSE EXHAUST GAS RECIRCULATION (EGR) VALVE (FRONT OF ENGINE NEAR THERMOSTAT HOUSING) FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH FLUID TEMPERATURE SENSOR (INTERNAL) 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 GRY WIRE HOT IN RUN, START IGNITION LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE NOTE: FUEL INJECTORS ARE LOCATED IN CENTRAL SFI, CENTER OF INTAKE MANIFOLD PNK PNK PNK 1 2 3 4 WIRE PNK PNK PNK PNK PNK PNK PNK WIRE PNK PNK PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PRESSURE CONTROL SOLENOID VALVE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TORQUE CONVERTOR CLUTCH PULSE WIDTH MODULATION SOLENOID TRANS.) UNDER HOOD FUSE-RELAY CENTER WHT WIRE YEL WIRE YEL/BLK WIRE

1226 1225 RANGE MODE SEL C RANGE MODE SEL B RANGE MODE SEL A 27 28 29 30 31 PPL 3/2 SHIFT SOL. PRESSURE CONTROL SOLENOID VALVE 7 8 9 10 12 13 14 15 VSS RTN GROUND A/C REQUEST SIG A/C SYSTEM A/T FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BOOST PRESSURE SENSOR BRN WIRE BRN/WHT (M/T) WIRE CRUISE CONTROL SWITCH DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK PNK WIRE ECT TEMP SENS IN BARO SENSOR INPUT GRN WIRE GRY WIRE GRY/BLK WIRE HEAVY DUTY ELECTRONIC 4-SPD AUTOMATIC OVERDRIVE TRANSMISSION INTAKE MAN AIR TEMP SENS APP 2 SIG GLOW PLUG RELAY FORCE MTR LOW LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT PNK WIRE MAP SENS INPUT FORCE MTR HI NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK PNK 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF I/P, ABOVE BLOWER MOTOR) PPL PPL (A/T) BRAKE SW IN BRAKE SWITCH INPUT CRUISE CTRL SW ENGAGE PPL (OR BRN/WHT) WIRE PPL/WHT WIRE RADIO RED WIRE RED/BLK WIRE RESUME SENSOR GND SET- SHIFT SOL. SHIFT SOL. TAN WIRE TAN/BLK WIRE TIMING STEPPER MTR (HIGH) 3 MODE CRUISE PPL SENSOR GND SENSOR GND APP 1 SIG TIMING STEPPER MTR (LOW) TIMING STEPPER MTR (LOW) TRANSMISSION SPEED INPUT TRANSMISSION TEMP INPUT TRANSMISSION TEMPERATURE SENSOR TRANSMISSIONS SYSTEM VEHICLE SPEED SENSOR BUFFER (BELOW LEFT SIDE OF I/P) VSS SIG VSS SIG VSS HI VSS OUTPUT VSS OUTPUT WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

27 28 29 30 31 PPL 5 VOLT REF BLK WIRE BLU WIRE BRAKE FUSE 18 BRAKE SWITCH ASSEMBLY (AT REAR OF BRAKE PEDAL SUPPORT BRACKET) BRN WIRE CLUTCH PEDAL POSITION (CPP) SWITCH (M/T ONLY) (TOP OF CLUTCH PEDAL) CMP SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK PNK WIRE ECM FUSE FUEL SOL FUSE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) ENGINE SHUTOFF FUEL SOLENOID SOLENOID DRIVER FUEL SOLENOID FUEL TEMPERATURE SENSOR GRN WIRE GRY WIRE HIGH RES SIG HOT AT ALL TIMES HOT IN HOT IN RUN OR START I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE ORG/ WIRE ORG/BLK 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 PNK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PPL (OR BRN/WHT) WIRE PPL PNK WIRE RED WIRE RED/BLK WIRE RUN WIRE SENS GRD STOP/HAZ FUSE 1 TAN WIRE TAN/BLK WIRE TIMING STEPPER MOTOR (TOP FRONT OF ENGINE) TRANS FUSE 20 UNDERHOOD FUSE-RELAY CENTER WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

"GLOW PLUGS" INDICATOR BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B FUSE FUEL LIFT PUMP (LEFT FRAME RAIL, BELOW DRIVER'S DOOR) W/DUAL TANKS FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY (IN UNDERHOOD FUSE-RELAY CENTER) FUEL PUMP/ OIL PRESSURE SWITCH AND SENDER (LEFT REAR OF ENGINE) GAUGES FUSE 4 GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER SYSTEM (FUEL PUMP BALANCE RELAY) LT GRN WIRE ORG/ WIRE PNK PNK 8 9 WIRE PNK PNK PNK WIRE PNK WIRE RED WIRE SERVICE ENGINE SOON INDICATOR SERVICE THROTTLE SOON INDICATOR TAN WIRE UNDERHOOD FUSE-RELAY CENTER VEHICLE SPEED INPUT W/DUAL TANKS W/O DUAL TANKS WAIT TO WATER IN FUEL INDICATOR WATER IN-FUEL SENSOR WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

"SERV ENG SOON" IND ENGINE SHUTOFF SOL OUT EGR SOL OUTPUT "SERV THROTTLE SOON" IND EGR VALVE SOL PUTPUT A/C ENABLE PCM GND PCM GND A/C SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (DLC) (LEFT SIDE OF I/P) PPL DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENG-I FUSE EXHAUST GAS RECIRCULATION (EGR) VENT SOLENOID EXHAUST GAS RECIRCULATION EGR SOLENOID (LEFT REAR TOP OF ENGINE) FUEL HEATER (TOP REAR OF ENGINE) FUEL SOL MODULE (5 VREF) FUSIBLE LINK FUSIBLE LINKS 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 GLOW PLUG RELAY (LEFT REAR OF ENGINE NEAR BULKHEAD) GLOW PLUGS FUSE GRD GROUND GRY WIRE HOT AT ALL TIMES FUSIBLE LINK HOT IN RUN OR START LT GRN WIRE MASS AIR FLOW (MAF SENSOR) ORG/ WIRE PNK IGN WIRE PNK PNK 439 439 IGNITION IGNITION WIRE PNK PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF I/P, ABOVE BLOWER MOTOR) PPL RED WIRE RELAY CTRL SIGNAL TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE-RELAY CENTER WASTEGATE SOL ENGINE SHUTOFF SOL OUT WASTEGATE SOLENOID WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE