GMC Sierra III (2013-2015) instrument panel junction block 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

5 VOLT REFERENCE REAR AIR TEMP DOOR CTRL REAR DEFOG RLY CTRL AMBIENT LIGHT/ SUNLOAD SENSOR (TOP CENTER OF DASH) BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MTR BLOWER MTR SPD CTRL BLU/GRY WIRE BLU/WHT WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DK BLU/BRN WIRE DK BLU/YEL WIRE FRT BLWR FUSE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/RED WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND THE UPPER GLOVE BOX) HVAC/AUX HVAC IGN FUSE INSIDE AIR TEMP SENS SIG INSTRUMENT PANEL JUNCTION BLOCK LEFT INSTRUMENT PANEL FUSE BLOCK LINEAR INTERCONNECT NETWORK BUS 9 LOGIC LT GRN WIRE LT GRN/YEL WIRE PEPS/HVAC FUSE RED/VIO WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SOLAR SENSOR DRIVER SIGNAL SPD CTRL TWILIGHT SENTINEL DELAY SIGNAL VIO/GRY WIRE VOLT BATT POSITIVE WHT/DK BLU WIRE YEL/VIO WIRE

10 9 LINEAR INTERCONNECT NETWORK BUS 3 LINEAR INTERCONNECT NETWORK BUS 2 2500 2501 24 25 HI SPD GMLAN SER DATA BUS (+) 1 HI SPD GMLAN SER DATA BUS (-) 1 2501 2500 24 25 HI SPD GMLAN SER DATA BUS (-) 1 HI SPD GMLAN SER DATA BUS (+) 1 5985 5986 22 23 ACC WAKEUP SER DATA SER DATA COMM ENABLE AIR BAG/INFO FUSE BLK WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) DATA LINK CONNECTOR (DLC) (LOWER LEFT SIDE OF DASH) DK BLU WIRE DK BLU/YEL WIRE DLC/DSM FUSE DRIVER SEAT HEATING, COOLING SWITCH GRN/VIO WIRE GRN/WHT WIRE GROUND DISTRIBUTION SYSTEM HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE (NEAR IGNITION CYLINDER) INSTRUMENT PANEL JUNCTION BLOCK LEFT INSTRUMENT PANEL FUSE BLOCK LINEAR INTERCONNECT NETWORK BUS 11 LINEAR INTERCONNECT NETWORK BUS 2 LINEAR INTERCONNECT NETWORK BUS 3 LINEAR INTERCONNECT NETWORK BUS 4 LINEAR INTERCONNECT NETWORK BUS 5 LINEAR INTERCONNECT NETWORK BUS 8 LO SPD GMLAN SER DATA LOGIC DRIVER WINDOW MOTOR (INSIDE DRIVER'S DOOR) LOGIC DRIVER WINDOW SWITCH LOGIC LEFT REAR WINDOW SWITCH LOGIC PASSENGER WINDOW SWITCH LOGIC RIGHT REAR WINDOW SWITCH LT GRN WIRE LT GRN/GRY WIRE LT GRN/LT BLU WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE PASSENGER SEAT HEATING, COOLING SWITCH PRODUCTION) RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SEAT HEATING CONTROL MODULE VIO/YEL WIRE WHT WIRE WHT/DK BLU WIRE

9 8 HI SPD GMLAN SER DATA (+) 2 HI SPD GMLAN SER DATA (-) 2 ACC WAKEUP SERIAL DATA BLK WIRE BLK/GRN WIRE BLK/ORG WIRE BRN/YEL WIRE DK BLU WIRE DK BLU/YEL WIRE FRONT, REAR PARKING ASSIST CONTROL MODULE (BELOW LOWER RIGHT OF REAR WINDOW) GRN/BLU WIRE GRN/WHT WIRE GRY WIRE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER DRIVER'S SEAT) INSTRUMENT PANEL JUNCTION BLOCK LINEAR INTERCONNECT NETWORK BUS 8 LO SPD GMLAN SER DATA LT GRN WIRE PASSENGER PRESENCE MODULE (UNDER FRONT OF PASSENGER SEAT CUSHION) POWER STEERING CONTROL MODULE (ON POWER STEERING RACK ASSEMBLY) SEAT MEMORY CONTROL MODULE (UNDER DRIVER SEAT) STEERING WHEEL ANGLE SENSOR (ON STEERING COLUMN) TRANSFER CASE CONTROL MODULE (LOWER LEFT SIDE OF DASH) VIO WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE YEL/BLU 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

11 13 COIL SPLY VOLT LAMP SPLY VOLTAGE 24 12 HAZARD SW RT TURN SIG HAZARD SW LT TURN SIG 26 1 HAZARD SWITCH SIGNAL BATT POSITIVE VOLT 3 4 LAMP SPLY VOLTAGE LAMP SPLY VOLTAGE 7 13 STOP LAMP SWITCH SIGNAL 5 VOLT REFERENCE BACKLIGHT DIMM CONTROL BATT POSITIVE VOLT BCM 4 FUSE BCM 6 FUSE BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BPP SENS LO REF BPP SENS SIG BRAKE PEDAL POSITION SENSOR (BEHIND BRAKE PEDAL ASSEMBLY) BRN/GRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DRIVER OUTSIDE REARVIEW MIRROR ENGINE CONTROL MODULE GLASS GMLAN DATA - (1) GRN/VIO WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LAMP RELAY CONTROL LEFT LICENSE PLATE LAMP LT GRN/WHT WIRE LT GRN/YEL WIRE PASSENGER OUTSIDE REARVIEW MIRROR REAR BODY JUNCTION BLOCK RED/DK BLU WIRE RED/GRY WIRE RED/LT GRN WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK (IN RIGHT END OF DASH) RIGHT LICENSE PLATE LAMP SENSOR LOW REFERENCE VIO/BLU WIRE VIO/WHT WIRE WHT WIRE WHT/GRN WIRE YEL/BLU WIRE

BLK WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CARGO LAMP FUSE CARGO LAMP RELAY CENTER HIGH MOUNTED DK BLU (OR YEL) WIRE DK BLU WIRE DK GRN (OR YEL) WIRE DK GRN WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES INSTRUMENT PANEL JUNCTION BLOCK LEFT FRONT PARK LAMP LEFT HEADLAMP ASSEMBLY LEFT LOWER PARK/TURN SIGNAL LAMP LEFT MULTI-FUNCTION LED CONTROL MODULE HEADLAMP LEFT PARK DAYTIME RUNNING LAMP LEFT PARK/TURN SIGNAL LAMP LEFT UPPER PARK/TURN SIGNAL LAMP LT BLU WIRE LT GRN LT BLU WIRE NCA WIRE ORG/ WIRE PNK WIRE PPL RED WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK (IN RIGHT END OF DASH) STOP LAMP VIO/GRY WIRE WHT WIRE WHT/VIO WIRE YEL WIRE

AJAR SW SIG BLK WIRE BLU/WHT WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE CHILD SECURITY LOCK DISABLE RELAY COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE DOOR DEAD LOCK RELAY DRIVER DOOR LOCK SWITCH GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/WHT WIRE INSTRUMENT PANEL JUNCTION BLOCK LIN BUS 3 LIN BUS 4 LOGIC LT GRN/GRY WIRE PASSENGER DOOR LATCH ASSEMBLY (IN REAR OF PASSENGER FRONT DOOR) PASSENGER WINDOW SWITCH RF DR RIGHT REAR DOOR LATCH ASSEMBLY (CREW CAB: REAR OF RIGHT REAR DOOR) RIGHT REAR WINDOW SWITCH RR DR - VIO/YEL WIRE WHT/BLU WIRE YEL WIRE YEL/LT GRN WIRE

BLK WIRE BODY CONTROL MODULE COLLISION ALERT INDICATORS DATA LINK CONNECTOR DRIVER SEAT HEATING, COOLING SWITCH FORWARD ADJUSTABLE PEDAL RELAY HEADLAMP SWITCH HVAC CONTROL MODULE IGNITION MAIN RELAY IGNITION RUN/ CRANK RELAY INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK NCA WIRE PASSENGER SEAT HEATING, COOLING SWITCH REARWARD ADJUSTABLE PEDAL RELAY RETAINED ACCESSORY POWER RELAY 1 STEERING WHEEL ANGLE SENSOR TRANSMISSION SHIFT LEVER TRANSMISSION SHIFT LOCK CONTROL SOLENOID ACTUATOR TURN SIGNAL/ MULTI-FUNCTION SWITCH WHT WIRE WINDSHIELD WIPER MOTOR

ACCESSORY DC/AC PANEL 2 POWER ACCESSORY INVERTER POWER MODULE RECEPTACLE BLK WIRE BRN WIRE CENTER CONSOLE COMPARTMENT LAMP CENTER HIGH MOUNTED STOP LAMP DATA LINK CONNECTOR DOME LAMP SWITCH DOME/ READING LAMPS FRONT OVERHEAD CONSOLE LEFT DOME/ READING LAMPS FRONT OVERHEAD CONSOLE RIGHT DOME/ READING LAMPS FRONT VIEW CAMERA MODULE GARAGE DOOR OPENER HORN SWITCH INSIDE REARVIEW MIRROR INSTRUMENT INSTRUMENT PANEL 1 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL 3 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL JUNCTION BLOCK LEFT STEERING WHEEL CONTROLS SWITCH LEFT SUNSHADE MIRROR LAMP OVERHEAD CONSOLE ACCENT LAMP PASSENGER AIR BAG DISABLED INDICATOR POLICE PROVISION (BLUNT CUT) RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT STEERING WHEEL CONTROLS SWITCH RIGHT SUNSHADE MIRROR LAMP ROOF BEACON SWITCH ROOF BLOWER BEACON MOTOR RELAY SLIDING REAR WINDOW CLOSE RELAY SLIDING REAR WINDOW OPEN RELAY SLIDING REAR WINDOW SWITCH STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE SUNROOF MOTOR SUNROOF SWITCH