GMC Sierra III (2013-2015) engine control module (left front of engine compt, near fan shroud) 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

12 10 HI SPD GMLAN SER DATA (-) 1 HI SPD GMLAN SER DATA (+) 1 22 14 TRAILER BRAKE ENABLE SIGNAL ACC WAKEUP SER DATA 26 29 6 18 HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (-) 1 27 28 5 17 HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (-) 1 3 4 HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (-) 1 CHASSIS CONTROL MODULE CONTROL SOLENOID VALVE ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY DK BLU WIRE DK BLU/BLK WIRE DK BLU/YEL WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT SIDE OF FRAME ASSEMBLY) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) FRONTVIEW CAMERA MODULE (BEHIND INSIDE REARVIEW MIRROR) FUEL PUMP DRIVER CONTROL MODULE (MOUNTED TO BRACKET ABOVE SPARE TIRE) HIGH SPEED BUS TERMINATING LO SPD GMLAN SER DATA LT GRN WIRE RESISTOR SER DATA COMM ENABLE TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE TRAILER BRAKE ENABLE SIGNAL TRAILER BRAKE POWER CONTROL MODULE (MOUNTED TO BRACKET ABOVE SPARE TIRE) VIO/YEL WIRE W/O EXTENDED FUEL ECONOMY W/ EXTENDED FUEL ECONOMY WHT WIRE WHT/DK BLU WIRE YEL/BLK WIRE

12 VOLT REF 24 25 HI SPD GMLAN SRL DATA (-) HI SPD GMLAN SRL DATA (+) 5360 5361 BRK APPLY SENS LO REF 7 13 STP LP SW SIG 5 VOLT SIG ADAP CRUISE CTRL UP DWN SW SIG BATT POS VOLT BCM 1 PANEL FUSE FUSE BLOCK BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRAKE PEDAL POSITION SENSOR (BEHIND BRAKE PEDAL ASSEMBLY) BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE CTRL SET/COAST/ RES/ACC SW SIG CRUISE/ETC/TCC/BRAKE SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM IGN FUSE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GROUND GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL JUNCTION BLOCK LEFT INSTRUMENT LT GRN/WHT WIRE RED/WHT WIRE SENSOR LO REF SIG GND THRTL ACTR CTRL CLOSE THRTL ACTR CTRL OPEN UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY FUSE BLOCK (ENGINE COMPTT TOP FUSE 4 RIGHT) BLK WIRE BLK/WHT WIRE BLOCK DLIS FUSE BLU WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DK BLU WIRE ECM IGN FUSE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GRY WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT W/ IGNITION MAIN RELAY ENERGIZED I/P BEC 2 FUSE IGNITION SWITCH LT GRN WIRE OFF PPL PPL/LT GRN WIRE RED WIRE RED/BLU WIRE RUN WIRE RUN/CRANK IGN 1 VOLT STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY STRTR FUSE SWITCH TRANSMISSION INTERNAL MODE TRANSMISSION PARK/ NEUTRAL SIGNAL 1 UNDERHOOD FUSE BLOCK (ON POSITIVE BATTERY TERMINAL) VIO/BLK WIRE WHT WIRE WHT/GRY WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE COMPUTER DATA LINES SYSTEM DATA 1 (+) DK BLU WIRE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) FRONT AXLE ENGAGEMENT ACTUATOR (ON REAR OF TRANSFER CASE) GRY/BLK WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED LOCK IND LOGIC LOW SIG POWER DISTRIBUTION SYSTEM SERIAL TRANS IGN FUSE TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/BLK WIRE WHT WIRE YEL/WHT WIRE

2-HI IND 4-HI IND 4-LO IND BLK WIRE BLK/LT GRN WIRE BLU/GRY WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM DATA 1 (+) DK BLU WIRE DK BLU/YEL WIRE ENGINE BLOCK) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GRY/LT GRN WIRE GRY/RED WIRE IGN 3 ILL INSTRUMENT PANEL JUNCTION BLOCK LOW REF LT GRN/BLK WIRE NEUTRAL IND RED/GRY WIRE SERIAL SERIAL DATA (-) (1) SNSR SIG TRANSFER CASE MOTOR (ON TRANSFER CASE) TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) TRANSMISSION OUTPUT SHAFT SPEED SENSOR (IN TRANSMISSION) VEH SPD VEH SPD SNSR VIO WIRE VIO/BRN WIRE VIO/LT GRN WIRE VIO/WHT WIRE WHT WIRE WHT/LT GRN WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE