GMC Sierra III (2013-2015) (on lower left front of engine) Wiring diagrams

A/C CLUTCH A/C COMPRESSOR CLUTCH RELAY A/C COMPRESSOR CLUTCH RELY CTRL A/C PRESS SENS 5 VOLT REF 1 A/C REFRIGERANT PRESS SENS LO REF A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) AMBT AIR TEMP SNSR SIG B+ VOLT BATT+ VOLT BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/WHT WIRE BRN WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOL FAN 1 FUSE COOL FAN 2 FUSE DK BLU WIRE DK BLU/GRY WIRE ENG COOLANT TEMP SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE CONTROLS FUSE GRN WIRE HI SPD COOLING FAN RLY CTRL HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES IGNITION RELAY LEFT COOLING FAN MOTOR (LEFT FRONT OF ENGINE COMPT) LO REF LT GRN WIRE RED/BRN WIRE RED/GRY WIRE RED/WHT WIRE RIGHT COOLING FAN MOTOR (RIGHT FRONT OF ENGINE COMPT) TCM/ECM FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/GRY WIRE

BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE CHMSL FUSE DK BLU WIRE DK GRN WIRE GRN/VIO WIRE GRY/BRN WIRE HEADLIGHTS SYSTEM LT BLU WIRE LT GRN LT BLU WIRE NCA WIRE ORG/ WIRE PNK WIRE PPL PRK LMP LT FUSE PRK LMP RT FUSE REAR BODY JUNCTION BLOCK RED WIRE RED/LT GRN WIRE RIGHT FRONT PARK LAMP RIGHT HEADLAMP ASSEMBLY RIGHT LOWER PARK/TURN SIGNAL LAMP RIGHT MULTI-FUNCTION LED CONTROL MODULE HEADLAMP RIGHT PARK DAYTIME RUNNING LAMP RIGHT PARK/TURN SIGNAL LAMP RIGHT UPPER PARK/TURN SIGNAL LAMP STOP LAMP RELAY TRAILER PARK LAMPS RELAY UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/GRY WIRE VIO/WHT WIRE WHT WIRE YEL WIRE YEL/BLU WIRE

4 2 1 ACTR SPLY VOLT ACTR TRANSMIT SIG ACTR RTN ACTR RECEIVE SIG AJAR SW SIG ANTENNA BLK WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DISPLAY DK BLU/WHT WIRE DOOR AJAR IND EXCEPT REGULAR CAB GRY WIRE GRY/WHT WIRE INSTRUMENT CLUSTER LEFT REAR DOOR LATCH ASSEMBLY (CREW CAB: REAR OF LEFT REAR DOOR) LEFT REAR WINDOW SWITCH LIN BUS 4 LO SPD GMLAN SERIAL DATA LOGIC LOGIC REMOTE CONTROL DOOR LOCK RECEIVER LR DR LT GRN WIRE LT GRN/GRY WIRE SECURITY IND W/ POWER OPERATED WINDOW W/O POWER OPERATED WINDOW WHT/BLU WIRE YEL/LT GRN WIRE

ACTIVE GRILLE AIR SHUTTER 1 MOTOR MODULE ACTIVE GRILLE AIR SHUTTER 2 MOTOR MODULE BLK WIRE CHEVROLET CHEVROLET LEFT LEFT LOWER UPPER PARK/ PARK/ TURN TURN SIGNAL SIGNAL LAMP LAMP DRIVER CUSHION SEAT BLOWER ASSEMBLY DRIVER CUSHION SEAT HEATING ELEMENT DRIVER DRIVER BACK BACK SEAT SEAT BLOWER HEATING ASSEMBLY ELEMENT DRIVER DRIVER OUTSIDE WINDOW REARVIEW SWITCH MIRROR GLASS DRIVER OUTSIDE REARVIEW MIRROR DRIVER OUTSIDE REARVIEW MIRROR COURTESY LAMP DRIVER RIGHT REAR SEAT DRIVER HAPTIC SEAT MOVEMENT ADJUSTER MOTOR SWITCH DRIVER SEAT DRIVER MEMORY WINDOW LEFT REAR SWITCH MOTOR WINDOW SWITCH FROM BATTERY (DIAGRAM 5 OF 5) FRONT WASHER DIODE GMC GMC/ CHEVROLET HOOD AJAR SWITCH LEFT COOLING FAN HORN MOTOR LEFT FRONT FOG LAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HIGH BEAM CONTROL MODULE LEFT HEADLAMP LEFT MULTI-FUNCTION LOW LED CONTROL BEAM MODULE HEADLAMP LEFT HIGH LEFT LOW BEAM BEAM HEADLAMP HEADLAMP LEFT PARK/ TURN SIGNAL LAMP LEFT TURN SIGNAL REPEATER LAMP NCA WIRE OUTSIDE LEFT REAR REARVIEW DOOR LATCH MIRROR ASSEMBLY SWITCH RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HIGH BEAM CONTROL MODULE RIGHT HEADLAMP RIGHT MULTI-FUNCTION LOW LED CONTROL BEAM MODULE HEADLAMP RIGHT PARK/ TURN SIGNAL LAMP RIGHT RIGHT FRONT COOLING FOG FAN LAMP MOTOR RIGHT RIGHT HIGH LOW BEAM BEAM HEADLAMP HEADLAMP RIGHT RIGHT UPPER LOWER PARK/ PARK/ TURN TURN SIGNAL SIGNAL LAMP LAMP W/ LANE DEPARTURE WARNING W/ MEMORY W/O MEMORY W/O POWER WINDOW W/ POWER WINDOW WINDSHIELD WASHER WINDSHIELD FLUID WASHER LEVEL PUMP SWITCH

24 25 GMLAN SERIAL DATA (-) GMLAN SERIAL DATA (+) 2500 2501 COMPUTER DATA LINES SYSTEM 3 2 1 IMMOBILIZER SPLY VOLT LIN BUS 11 IMMOBILIZER RETURN ANTENNA BATT POSITIVE VOLT BCM 3 FUSE BLK WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DISPLAY DK BLU WIRE GRN/GRY WIRE GRN/VIO WIRE GRY/BLK WIRE HOOD AJAR SW SIG HOT AT ALL TIMES INSTRUMENT PANEL LEFT FUSE BLOCK (LOWER LEFT SIDE OF DASH) IMMOBILIZER CONTROL MODULE (NEAR IGNITION CYLINDER) INSTRUMENT CLUSTER LIN BUS 11 LO SPD GMLAN SERIAL DATA LOGIC LT GRN WIRE RED/GRY WIRE RETURN SECURITY LOGIC INDICATOR SPLY VOLT WHT WIRE

4 2 1 ACTR SPLY VOLT ACTR TRANSMIT SIG ACTR RTN ACTR RECEIVE SIG AJAR SW SIG ANTENNA BLK WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DISPLAY DK BLU/WHT WIRE DOOR AJAR IND EXCEPT REGULAR CAB GRY WIRE GRY/WHT WIRE INSTRUMENT CLUSTER LEFT REAR DOOR LATCH ASSEMBLY (CREW CAB: REAR OF LEFT REAR DOOR) LEFT REAR WINDOW SWITCH LIN BUS 4 LO SPD GMLAN SERIAL DATA LOGIC LOGIC REMOTE CONTROL DOOR LOCK RECEIVER LR DR LT GRN WIRE LT GRN/GRY WIRE SECURITY IND W/ POWER OPERATED WINDOW W/O POWER OPERATED WINDOW WHT/BLU WIRE YEL/LT GRN WIRE

A/T ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 1 (LEFT FRONT CORNER OF VEHICLE) ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 2 (RIGHT FRONT CORNER OF VEHICLE) AERO SHUTTER FUSE BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE CHASSIS CONTROL MODULE CNTRL CNTRL 2 COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER (DIC) ECM IGN FUSE ENGINE OIL IND FPPM FUSE FRAME POST) FUEL GAUGE IND GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER LO SPD GMLAN LOGIC LOW ENGINE OIL PRESSURE IND LT GRN WIRE M/T MALFUNCTION IND LAMP PPL/LT GRN WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SER DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/DK BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT (OR GRY/RED) WIRE WHT WIRE WHT/RED WIRE WHT/VIO WIRE YEL WIRE YEL/WHT WIRE

ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 1 (LEFT FRONT CORNER OF VEHICLE) ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 2 (RIGHT FRONT CORNER OF VEHICLE) AERO SHUTTER FUSE BLK WIRE BLK/BRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE CHASSIS CONTROL MODULE CNTRL CNTRL 2 COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DRIVER INFORMATION CENTER (DIC) ECM IGN FUSE ENGINE OIL IND FPPM FUSE FRAME POST) FUEL GAUGE IND GRY WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER LO SPD GMLAN LOGIC LOW ENGINE OIL PRESSURE IND LT GRN WIRE MALFUNCTION IND LAMP PPL/LT GRN WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SER DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/DK BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/RED WIRE WHT/VIO WIRE YEL WIRE YEL/WHT WIRE

1271 3202 5991 LOW REF LOW REF PWTN RLY CTRL 2500 1272 2760 COMPUTER DATA LINES SYSTEM PPL 5 VOLT REF 3 5985 439 440 COMPUTER DATA LINES SYSTEM PNK WIRE AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM STARTING/CHARGING SYSTEM ANTI-LOCK VEHICLE SPD SIG BRAKES SYSTEM APP SENS 1 SIG INLET PRESS SENS SIG A/C SENS SIG LOW REF FP RLY CTRL APP SENS 2 SIG MAF SENS SIG AXLE SW SIG BATT POS CNG SW 12 BLK WIRE BLK/WHT WIRE BRAKE SW SIG PARK/NEUTRAL SIG EXTERIOR LIGHTS SYSTEM TRANSMISSIONS SYSTEM BRN WIRE BRN/WHT WIRE COMPUTER DATA HIGH SPD DATA BUS - LINES SYSTEM DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EVAP VENT SOL CTRL FUEL PMP RELAY FUEL PUMP FUSE 20 GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES IAT SENS SIG INTAKE AIR TEMPERATURE SIGNAL MODIFICATION MODULE (LEFT FRONT OF ENGINE COMPT) LT BLU WIRE LT BLU/WHT WIRE MIL CTRL AIR COMPR CLTCH RLY CTRL CONDITIONING SYSTEM ORG/BLK WIRE PNK 8 9 WIRE PNK WIRE PPL RED/BLK WIRE RED/WHT WIRE STARTING/ CHARGE IND SIG CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/RED WIRE TAN/WHT WIRE TO PWR/TRN RELAY (DIAGRAM 2 OF 10) TRANSMISSIONS SYSTEM TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE HOLDER (ON POSITIVE BATTERY TERMINAL) WAKEUP SERIAL DATA IGNITION 1 VOLT B+ VOLT WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 1 (LEFT FRONT CORNER OF VEHICLE) ACTIVE GRILLE AIR SHUTTER MOTOR MODULE 2 (RIGHT FRONT CORNER OF VEHICLE) AERO SHUTTER FUSE BLK WIRE BLK/BRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE CHASSIS CONTROL MODULE CNTRL CNTRL 2 COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DRIVER INFORMATION CENTER (DIC) ECM IGN FUSE ENGINE OIL IND FPPM FUSE FRAME POST) FUEL GAUGE IND GRY WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER LO SPD GMLAN LOGIC LOW ENGINE OIL PRESSURE IND LT GRN WIRE MALFUNCTION IND LAMP PPL/LT GRN WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SER DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/DK BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/RED WIRE WHT/VIO WIRE YEL WIRE YEL/WHT WIRE