GMC Sierra III (2013-2015) (under vehicle at driver door on body mount frame post) Wiring diagrams

ABS PUMP FUSE ABS VLV FUSE BLK WIRE BLK/YEL WIRE BRAKE PRESSURE MODULATOR BRAKE VACUUM SNSR LOW REF BATT POSITIVE VOLT CMBD VHCE IN SNSR SPLY VOLT BRAKE FLUID LEVEL SNSR SIGL COMPUTER DATA LINES SYSTEM COMPUTER DATALINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT SIDE OF FRAME ASSEMBLY) GMLAN GMLAN SERIAL DATA (-) (1) GMLAN SERIAL DATA (+) (1) GRY WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/WHT WIRE GRY/YEL WIRE HOT AT ALL TIMES INSTRUMENT PANEL JUNCTION BLOCK LEFT FRONT WHEEL SPEED SENSOR (ON LEFT FRONT STEERING KNUCKLE) LEFT REAR WHEEL SPEED SENSOR (ON LEFT REAR BRAKE BACKING PLATE) LT GRN/BRN WIRE LT GRN/GRY WIRE NCA WIRE RED/VIO WIRE RED/YEL WIRE SENS SPLY VOLT SERIAL DATA COMM ENABLE LF RR WHL SPD SNSR SPLY VOLT LF REAR WHEEL SPD SNSR SIG STEERING ANGLE SENSOR (ON STEERING COLUMN) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

25 24 19 GMLAN DATA(+) GMLAN DATA(-) SNSR LOW REF 2500 2501 522 COMPUTER DATA LINES SYSTEM 39 40 HI SPD GMLAN SERIAL DATA + HI SPD GMLAN SERIAL DATA - 5361 (OR 5066) ABS BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/WHT (OR BLK) WIRE BLK/WHT WIRE BLK/YEL WIRE BLOCK BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRAKE APPLY SENSOR LOW REF BRAKE APPLY SNSR SIG BRAKE APPLY SNSR SPLY VOLT BRAKE ESC ESC OFF IND IND IND IND BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE PEDAL POSITION SENSOR (BEHIND BRAKE PEDAL ASSEMBLY) BRK APPL SENS SIG BRK APPL SPL VOLT BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/VIO WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) GRN WIRE GRY WIRE GRY/BRN WIRE GRY/RED WIRE GRY/YEL WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION INSTRUMENT PANEL MULTI- FUNCTION SWITCH IPC IGN/ SDM IGN FUSE LEFT INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LT GRN/BLK WIRE LT GRN/GRY WIRE NCA WIRE NEAR FAN SHROUD) PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) POWER DISTRIBUTION SYSTEM PRK BRK SW RED WIRE RIGHT REAR WHEEL SPEED SENSOR (ON RIGHT REAR BRAKE BACKING PLATE) TRACTION CONTROL OFF IND TRACTION CONTROL OFF SWITCH TRACTION SW VIO WIRE VIO/BLK WIRE WHT WIRE WHT/GRN WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

BACKUP LAMPS CIRCUIT BATTERY FUSE BLOCK (ENGINE COMPT, TOP RIGHT) BCM 1 FUSE BCM 3 FUSE BCM 7 FUSE BLK WIRE BLU WIRE BLU/WHT WIRE BRN/GRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DATA DRIVER INFORMATION CENTER DISPLAY FUSE 4 GRN/VIO WIRE GRN/WHT WIRE GRY/BRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER IPC FUSE LAMP LEFT BACKUP LAMP LEFT INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT LEFT INSTRUMENT PANEL JUNCTION BLOCK LEFT LOWER TAIL/STOP, TURN SIGNAL LAMP LEFT REAR SIDE MARKER LAMP LEFT TAIL LAMP ASSEMBLY LEFT TURN IND LEFT UPPER TAIL/STOP, TURN SIGNAL LAMP LOGIC LT GRN WIRE MARKER LAMP POSITIVE BATT POWER DISTRIBUTION SYSTEM REAR BODY JUNCTION BLOCK RED/GRY WIRE RED/LT GRN WIRE RED/WHT WIRE RIGHT BACKUP RIGHT LOWER TAIL/STOP, RIGHT REAR SIDE RIGHT TAIL LAMP ASSEMBLY RIGHT TURN IND RIGHT UPPER TAIL/STOP, TURN SIGNAL LAMP SER GMLAN LO SPD SIDE OF DASH) TURN SIGNAL LAMP VIO/GRY WIRE VIO/WHT WIRE VOLT YEL/BLU WIRE

A/C (A/T) COMPRESSOR TRANSFER CASE SHIFT A/C CONTROL COMPRESSOR SWITCH CLUTCH AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY CURRENT SENSOR BLK WIRE BODY CONTROL MODULE BRAKE FLUID LEVEL SWITCH CHASSIS CONTROL MODULE CONTROL SOLENOID VALVE ASSEMBLY ELECTRONIC BRAKE CONTROL MODULE ENGINE BACK LAMP MULTI-FUNCTION OIL INTAKE AIR LEVEL SWITCH SENSOR SWITCH ENGINE CONTROL MODULE FRONT AXLE ENGAGEMENT ACTUATOR FUEL PUMP FUEL DRIVER COMPOSITION CONTROL SENSOR MODULE IGNITION STOP MAIN LAMP RELAY RELAY INSTRUMENT PANEL JUNCTION BLOCK LEFT CARGO LAMP LEFT LICENSE PLATE LAMP LEFT LOWER TAIL/ STOP, TURN SIGNAL LAMP LEFT REAR LEFT SIDE BACKUP MARKER LAMP LAMP LEFT TAIL LAMP ASSEMBLY LEFT UPPER TAIL/ STOP, TURN SIGNAL LAMP REAR BODY JUNCTION BLOCK REAR DEFOGGER GRID REAR DEFOGGER RELAY RIGHT CARGO LAMP RIGHT LICENSE PLATE LAMP RIGHT LOWER TAIL/ STOP, TURN SIGNAL LAMP RIGHT REAR RIGHT SIDE BACKUP MARKER LAMP LAMP RIGHT TAIL LAMP ASSEMBLY RIGHT UPPER TAIL/ STOP, TURN SIGNAL LAMP TRAILER BRAKE POWER CONTROL MODULE TRAILER CONNECTOR TRANSFER CASE CONTROL MODULE TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ TWO SPEED ELECTRIC SHIFT CONTROL W/O TWO SPEED ELECTRIC SHIFT CONTROL WHT WIRE WINDSHIELD WASHER STARTER PUMP RELAY RELAY WINDSHIELD WIPER MOTOR WIPER WIPER WINDSHIELD LOW HIGH WIPER SPEED SPEED RELAY DIODE DIODE

18 20 GMLAN SER DATA (+) GMLAN SER DATA (-) BCM 3 FUSE BLK WIRE BLK/ORG WIRE BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE IND BREAKOUT) BRK FLUID LVL COMPUTER DATA LINES SYSTEM DISPLAY DK BLU WIRE DK BLU/YEL WIRE DLIS FUSE DRIVER SEAT BELT SWITCH DRIVER SEAT BELT BUCKLE DRIVER SEAT POSITION SENSOR ELECTRONIC BRAKE CONTROL MODULE (ON LEFT SIDE OF FRAME ASSEMBLY) HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER DRIVER'S SEAT) INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK IPC IGN/SDM IGN FUSE KEY-IN IGNITION SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT LO SPD GMLAN SERIAL DATA LOGIC LOW TIRE PRESSURE IND LT GRN WIRE LT GRN/GRY WIRE NCA WIRE OFF ORG/BLU WIRE ORG/BRN WIRE ORG/GRN WIRE ORG/VIO WIRE PASS SEAT BELT IND PASSENGER AIR BAG DISABLE INDICATOR PASSENGER SEAT BELT SWITCH PASSENGER SEAT BELT BUCKLE PASSENGER SEAT POSITION SENSOR RED/BLU WIRE RED/GRY WIRE RUN WIRE RUN/CRANK SEAT BELT IND SEAT BELT ON IND SIDE OF DASH) VIO/BLK WIRE VIO/WHT WIRE WHT WIRE WHT/VIO WIRE

A/C COMPRESSOR CLUTCH RELAY AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/BLK WIRE BRN/RED WIRE COMPUTER COMPUTER DATA LINES DATA LINES SYSTEM SYSTEM COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE ECM A/C CLUTCH FUSE ENG FUSE ECM IGN IGN FUSE FUSE ENGINE CONTROLS IGNITION RELAY ENGINE COOLANT TEMPERATURE SENSOR (LEFT SIDE OF ENGINE) FUEL COMPOSITION SENSOR (BETWEEN FUEL TANK, ELECTRONIC BRAKE CONTROL MODULE) FUEL PRESSURE SENSOR FUEL PUMP DRIVER CONTROL MODULE (MOUNTED TO BRACKET ABOVE SPARE TIRE) GRY WIRE HOT AT ALL TIMES IGN 1 VOLT INJ A ODD FUSE INJ B EVEN FUSE INJ B INJ A ECM EVEN ODD FUSE FUSE FUSE LOW REF NCA WIRE OUT SIG PPL/LT GRN WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SER DATA SHIELD SNSR A FUSE SNSR B FUSE SPLY VOLT TCM/ ECM FUSE VIO/DK BLU WIRE VIO/LT GRN WIRE VIO/YEL WIRE WHT WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BRN/RED WIRE COMPUTER COMPUTER DATA LINES DATA LINES SYSTEM SYSTEM COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/BLK WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE ECM IGN FUSE ENG FUSE ECM ENGINE CONTROLS IGNITION RELAY ENGINE COOLANT TEMPERATURE SENSOR (ON TOP OF ENGINE) FUEL COMPOSITION SENSOR (BETWEEN FUEL TANK, ELECTRONIC BRAKE CONTROL MODULE) FUEL PRESSURE SENSOR FUEL PUMP DRIVER CONTROL MODULE (MOUNTED TO BRACKET ABOVE SPARE TIRE) GRY WIRE HOT AT ALL TIMES HOT W/ IGN MAIN RELAY ENERGIZED IGN 1 VOLT INJ A ODD FUSE INJ B A/C CLUTCH FUSE EVEN IGN IGN FUSE FUSE FUSE INJ B INJ A ECM EVEN ODD FUSE FUSE FUSE LOW REF NCA WIRE ON BODY MOUNT FRAME POST) OUT SIG PPL/LT GRN WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SENSOR B FUSE SER DATA SHIELD SNSR A FUSE SPARK PLUG SPLY VOLT TCM/ ECM FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/DK BLU WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BRN/RED WIRE COMPUTER COMPUTER DATA LINES DATA LINES SYSTEM SYSTEM COMPUTER DATA LINES SYSTEM DATA DK BLU WIRE DK BLU/BLK WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE ECM IGN FUSE ENG FUSE ECM ENGINE CONTROLS IGNITION RELAY ENGINE COOLANT TEMPERATURE SENSOR (ON TOP OF ENGINE) FUEL COMPOSITION SENSOR (BETWEEN FUEL TANK, ELECTRONIC BRAKE CONTROL MODULE) FUEL PRESSURE SENSOR FUEL PUMP DRIVER CONTROL MODULE (MOUNTED TO BRACKET ABOVE SPARE TIRE) GRY WIRE HOT AT ALL TIMES HOT W/ IGN MAIN RELAY ENERGIZED IGN 1 VOLT INJ A ODD FUSE INJ B A/C CLUTCH FUSE EVEN IGN IGN FUSE FUSE FUSE INJ B INJ A ECM EVEN ODD FUSE FUSE FUSE LOW REF NCA WIRE ON BODY MOUNT FRAME POST) OUT SIG PPL/LT GRN WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SENSOR B FUSE SER DATA SHIELD SNSR A FUSE SPARK PLUG SPLY VOLT TCM/ ECM FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/DK BLU WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE