GMC Yukon III (2006-2014) engine coolant temperature (ect) sensor (front of left cylinder head) Wiring diagrams

BLK WIRE COIL CTRL DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN-1 FUSE 57 PWR/ TRN RELAY FAN-2 FUSE 60 GRY WIRE HOT AT ALL TIMES LEFT COOLING FAN (BEHIND RADIATOR) LOW REF LT BLU WIRE RIGHT COOLING FAN (BEHIND RADIATOR) RLY CTRL SENS SIG TAN WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

BLK WIRE COIL CTRL DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN-1 FUSE 57 PWR/ TRN RELAY FAN-2 FUSE 60 GRY WIRE HOT AT ALL TIMES LEFT COOLING FAN (BEHIND RADIATOR) LOW REF LT BLU WIRE RIGHT COOLING FAN (BEHIND RADIATOR) RLY CTRL SENS SIG TAN WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

49 55 35 RLY CTRL SENS SIG LOW REF 410 2761 AUXILIARY FUSE BLOCK (LEFT SIDE OF ENGINE BLK WIRE COMPT) DK BLU WIRE DK GRN WIRE ENG FUSE 4 ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) FAN 1 FUSE FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN MID 1 RELAY FAN MID 2 RELAY FAN-2 FUSE GRY WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY ENERGIZED LEFT COOLING FAN (BEHIND RADIATOR) LEFT ENGINE COOLING FAN RESISTOR (LEFT SIDE OF RADIATOR) LT BLU WIRE PNK WIRE PPL PPL 41 54 RLY CTRL RLY CTRL RIGHT COOLING FAN (BEHIND RADIATOR) RIGHT ENGINE COOLING FAN RESISTOR (RIGHT SIDE OF RADIATOR) TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

BLK WIRE COIL CTRL DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN-1 FUSE 57 PWR/ TRN RELAY FAN-2 FUSE 60 GRY WIRE HOT AT ALL TIMES LEFT COOLING FAN (BEHIND RADIATOR) LOW REF LT BLU WIRE RIGHT COOLING FAN (BEHIND RADIATOR) RLY CTRL SENS SIG TAN WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

21 22 SENS SIG LOW REF A/C CMPRSR FUSE 17 A/C CMPRSR RELAY AUX HVAC-IGN FUSE 48 BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY ENERGIZED HVAC BATT FUSE 39 HVAC BLWR FUSE 70 HVAC-IGN FUSE 55 LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE ORG/BLK WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (RIGHT END OF DASH) RUN/ CRANK RELAY TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ HEATED STEERING WHEEL WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

21 22 SENS SIG LOW REF A/C CMPRSR FUSE 17 A/C CMPRSR RELAY AUX HVAC-IGN FUSE 48 BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY ENERGIZED HVAC BATT FUSE 39 HVAC BLWR FUSE 70 HVAC-IGN FUSE 55 LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE ORG/BLK WIRE PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (RIGHT END OF DASH) RUN/ CRANK RELAY TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ HEATED STEERING WHEEL WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

18 19 PNK WIRE BANK 1 SENS 1 BANK 2 SENS 1 BLK WIRE BRN WIRE CAMSHAFT POSITION (CMP) SENSOR (LOWER FRONT OF ENGINE) CRANKSHAFT POSITION (CKP) SENSOR (RIGHT REAR OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DUTY CYCLE SIG ECT SENS SIG ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN SENSOR INJ 1 CTRL INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 5 CTRL INJ 6 CTRL INJ 7 CTRL INJ 8 CTRL KNOCK SENSOR (KS) 1 (LEFT SIDE OF ENGINE) KNOCK SENSOR (KS) 2 (RIGHT SIDE OF ENGINE) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (TOP REAR OF ENGINE) NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK GRY/WHT WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL/WHT WIRE PURGE SOL CTRL SENS 1 SIG SENS 2 SIG SENSOR 1 (UNDER LEFT SIDE OF ENGINE COMPT, IN EXHAUST) SENSOR 1 (UNDER RIGHT SIDE OF ENGINE COMPT, IN EXHAUST) SOL CTRL SOL CTRL 1 SOL CTRL 2 SOL CTRL 3 SOL CTRL 4 STARTING/ CHARGING SYSTEM TAC MTR CTRL 1 TAC MTR CTRL 2 TAN PPL/WHT WIRE TAN WIRE TAN/WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

18 19 PNK WIRE BANK 1 SENS 1 BANK 2 SENS 1 BLK WIRE BRN WIRE CAMSHAFT POSITION (CMP) SENSOR (LOWER FRONT OF ENGINE) CRANKSHAFT POSITION (CKP) SENSOR (RIGHT REAR OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DUTY CYCLE SIG ECT SENS SIG ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN SENSOR INJ 1 CTRL INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 5 CTRL INJ 6 CTRL INJ 7 CTRL INJ 8 CTRL KNOCK SENSOR (KS) 1 (LEFT SIDE OF ENGINE) KNOCK SENSOR (KS) 2 (RIGHT SIDE OF ENGINE) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (TOP REAR OF ENGINE) NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK GRY/WHT WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL/WHT WIRE PURGE SOL CTRL SENS 1 SIG SENS 2 SIG SENSOR 1 (UNDER LEFT SIDE OF ENGINE COMPT, IN EXHAUST) SENSOR 1 (UNDER RIGHT SIDE OF ENGINE COMPT, IN EXHAUST) SOL CTRL SOL CTRL 1 SOL CTRL 2 SOL CTRL 3 SOL CTRL 4 STARTING/ CHARGING SYSTEM TAC MTR CTRL 1 TAC MTR CTRL 2 TAN PPL/WHT WIRE TAN WIRE TAN/WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

6 SHUTOFF SOL 1 SHUTOFF SOL AIR CONDITIONING SYSTEM BANK 2 BANK 2 SENS 1 BANK 2 SENS 1 BANK 2 SENS 1 BANK 2 SENS 2 BANK 2 SENS 2 PPL PPL BAROMETRIC PRESSURE (BARO) SENSOR (LEFT SIDE OF ENGINE COMPT) BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM COOLING FANS SYSTEM AIR CONDITIONING SYSTEM CYLINDER SHUTOFF SOLENOID 1 CYLINDER SHUTOFF SOLENOID 2 CYLINDER SHUTOFF SOLENOID 3 CYLINDER SHUTOFF SOLENOID 4 DK BLU WIRE DK GRN/WHT WIRE ECT SENS SIG ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) GRY WIRE HYBRID SYSTEM CIRCUIT LOW REF LOW REF LOW REF LOW REF LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (TOP REAR OF ENGINE) NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK PNK WIRE PNK WIRE PPL PRESS SENS SIG PRESS SENS SIG MAP SENS SIG PTLAN- PUMP RLY CTRL TAN WIRE TAN/BLK WIRE TRANSMISSIONS, CRUISE CONTROL SYSTEMS VALVE LIFTER OIL MANIFOLD (VLOM) ASSEMBLY (TOP OF ENGINE, BELOW INTAKE MANIFOLD) YEL WIRE

18 19 PNK WIRE BANK 1 SENS 1 BANK 2 SENS 1 BLK WIRE BRN WIRE CAMSHAFT POSITION (CMP) SENSOR (LOWER FRONT OF ENGINE) CRANKSHAFT POSITION (CKP) SENSOR (RIGHT REAR OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DUTY CYCLE SIG ECT SENS SIG ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN SENSOR INJ 1 CTRL INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 5 CTRL INJ 6 CTRL INJ 7 CTRL INJ 8 CTRL KNOCK SENSOR (KS) 1 (LEFT SIDE OF ENGINE) KNOCK SENSOR (KS) 2 (RIGHT SIDE OF ENGINE) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (TOP REAR OF ENGINE) NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK GRY/WHT WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL/WHT WIRE PURGE SOL CTRL SENS 1 SIG SENS 2 SIG SENSOR 1 (UNDER LEFT SIDE OF ENGINE COMPT, IN EXHAUST) SENSOR 1 (UNDER RIGHT SIDE OF ENGINE COMPT, IN EXHAUST) SOL CTRL SOL CTRL 1 SOL CTRL 2 SOL CTRL 3 SOL CTRL 4 STARTING/ CHARGING SYSTEM TAC MTR CTRL 1 TAC MTR CTRL 2 TAN PPL/WHT WIRE TAN WIRE TAN/WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE