GMC Sierra III facelift (2015-2018) instrument panel junction block Wiring diagrams

2/- ABS PUMP FUSE ABS VLV FUSE BATT POSITIVE VOLT BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/YEL WIRE BRAKE BOOSTER VACUUM SENSOR BRAKE FLUID LEVEL SENS SIG BRAKE FLUID LEVEL SWITCH BRAKE PRESSURE MODULATOR BRAKE VACUUM SENS 5 VOLT REF BRAKE VACUUM SENS LOW REF BRAKE VACUUM SENS SIG CMBD VHCE IN SENS SPLY VOLT COMPUTER DATA LINES SYSTEM DK BLU WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT SIDE OF FRAME ASSEMBLY) EXCEPT BASE EQUIPMENT BASE EQUIPMENT GMLAN GMLAN SERIAL DATA - 1 GMLAN SERIAL DATA 2 GRN/GRY WIRE 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 LEFT REAR WHEEL SPEED SENSOR LF WHL SPD SENS CTRL LF WHL SPD SENS SIG LR WHL SPD SENS CTRL LR WHL SPD SENS SIG LT GRN/BRN WIRE LT GRN/GRY WIRE NCA WIRE RED/VIO WIRE RED/YEL WIRE RF WHL SPD SENS CTRL RF WHL SPD SENS SIG RR WHL SPD SENS CTRL RR WHL SPD SENS SIG SENS SERIAL DATA COMM ENABLE SPLY VOLT STEERING WHEEL ANGLE SENSOR (ON STEERING COLUMN) UNDERHOOD FUSE BLOCK VEHICLE SPD SIG VIO WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/PPL WIRE YEL/RED WIRE

4.3L FLEX FUEL 5 VOLT REF 5.3L FLEX FUEL, 6.2L 6.6L TURBO DIESEL ABS IND. BASE EQUIPMENT BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/WHT WIRE BLU/VIO WIRE BLU/YEL WIRE BODY CONTROL MODULE BPP SENS LO REF BPP SENS SIG BRAKE IND BRAKE PEDAL POSITION SENSOR (BEHIND BRAKE PEDAL ASSEMBLY) COMPUTER DATA LINES SYSTEM DESCENT SW DK BLU WIRE DK BLU/VIO WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE EQUIPMENT) ESC IND ESC OFF IND EXCEPT BASE EXCEPT BASE EQUIPMENT GMLAN DATA GMLAN DATA - (1) GRN/GRY WIRE GRY/BRN WIRE GRY/RED WIRE GRY/YEL WIRE HILL DESCENT CONTROL SWITCH HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LOGIC NCA WIRE PARK BRAKE SWITCH PRK BRK SW SIG RED/GRY WIRE RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR SENS LOW REF STOP LP SW SIG TRACTION CONTROL OFF IND TRACTION CONTROL OFF SWITCH TRACTION SW VIO WIRE WHT WIRE WHT/GRN WIRE YEL WIRE

5-VOLT REFERENCE AIR TEMP DOOR CTRL LOW REFERENCE AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) ANTI-THEFT SYSTEM AUXILIARY HEATER CTRL AUXILIARY HEATER STATUS SIGNAL BATT POSITIVE BATT POSITIVE VOLT BATTERY FUSE BLOCK BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MOTOR BLOWER MTR BLOWER MTR SPD CTRL BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM ELECTRIC VARIABLE DISPLACEMENT CTRL ELECTRIC VARIABLE DISPLACEMENT SPLY EXCEPT BASE EQUIPMENT BASE EQUIPMENT FRT BLWR FUSE FUSE 1 GRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/RED WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER GLOVE BOX) HVAC/AUX HVAC IGN FUSE INSIDE AIR TEMP SENS SIGNAL INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LINEAR INTERCONNECT NETWORK BUS 9 LOGIC LOW SPD GMLAN SERIAL DATA PEPS/HVAC FUSE REAR DEFOG RLY CTRL RED/GRY WIRE RED/VIO WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN/CRANK IGN 1 VOLT SIGNAL GND SOLAR SENS DRIVER SIGNAL SPD CTRL TWILIGHT SENTINEL DELAY SIGNAL VIO WIRE VIO/GRY WIRE VOLT W/ ONSTAR W/O ONSTAR WHT WIRE WHT/BLU WIRE YEL/DK GRN WIRE YEL/VIO WIRE

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

6.0L 6.0L (VIN B) AUXILIARY BATTERY AUXILIARY BATTERY RELAY 1 AUXILIARY BATTERY RELAY 2 BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE COOLING FAN CONTROL MODULE ENGINE CONTROL MODULE ENGINE COOLANT LEVEL SWITCH FROM RIGHT HEADLAMP ASSEMBLY (DIAGRAM 2 OF 6) FRONT AXLE ENGAGEMENT ACTUATOR FUEL PUMP RELAY GLOW PLUG CONTROL MODULE HOOD AJAR SWITCH IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGNITION COIL 4 IGNITION COIL 5 IGNITION COIL 6 IGNITION COIL 7 IGNITION COIL 8 IGNITION MAIN RELAY INSTRUMENT PANEL JUNCTION BLOCK MULTI-FUNCTION INTAKE AIR SENSOR NITROGEN OXIDES SENSOR 1 POWER TAKE OFF (PTO) CONTROLS POWER TAKE-OFF CONTROL MODULE REAR DEFOGGER RELAY REDUCTANT CONTROL MODULE RIGHT FRONT FOG LAMP SECONDARY FUEL PUMP RELAY STARTER RELAY STOP LAMP RELAY TRAILER BACKUP LAMPS RELAY TRANSFER CASE CONTROL MODULE TRANSFER CASE SHIFT CONTROL SWITCH TRANSMISSION CONTROL MODULE TURBOCHARGER VANE POSITION ACTUATOR UNDERHOOD FUSE BLOCK WHT WIRE WINDSHIELD WASHER PUMP RELAY WINDSHIELD WIPER MOTOR WINDSHIELD WIPER RELAY

ACCESSORY DC/AC POWER INVERTER MODULE BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLK WIRE BLOWER MOTOR CARGO LAMP RELAY CENTER CONSOLE COMPARTMENT ACCESSORY POWER RECEPTACLE CENTER CONSOLE COMPARTMENT LAMP CENTER CONSOLE REAR ACCESSORY POWER RECEPTACLE CENTER HIGH MOUNTED STOP LAMP CHILD SECURITY LOCK DISABLE RELAY DATA LINK CONNECTOR DOME LAMP SWITCH DOOR DEAD LOCK RELAY ELECTRICAL AUXILIARY HEATER FIVE LAMP, ROOF MARKER FRONT MIDDLE ROOF CLEARANCE LAMP FRONT OVERHEAD CONSOLE LEFT DOME/ READING LAMPS GARAGE DOOR OPENER HORN SWITCH INSIDE REAR VIEW MIRROR INSTRUMENT PANEL 1 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL 2 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL JUNCTION BLOCK LEFT FRONT OUTER ROOF CLEARANCE LAMP LEFT STEERING WHEEL CONTROLS SWITCH LEFT SUNSHADE MOBILE DEVICE WIRELESS CHARGER MODULE NCA WIRE OVERHEAD CONSOLE ACCENT LAMP PASSENGER AIR BAG DISABLED INDICATOR RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED WIRE RETAINED ACCESSORY POWER RELAY 2 RIGHT FRONT OUTER ROOF CLEARANCE LAMP RIGHT FRONT OVERHEAD CONSOLE DOME/ READING LAMPS RIGHT STEERING WHEEL CONTROLS SWITCH RIGHT SUNSHADE ROOF BEACON PROVISION (BLUNT CUT) ROOF BEACON RELAY ROOF BEACON SWITCH 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 TRANSFER CASE SHIFT CONTROL SWITCH W/ HEATER STEERING WHEEL W/ ROOF MOUNTED PROVISIONS LAMP W/ SUN ROOF GLASS SLIDING WINDSHIELD FRONT VIEW CAMERA YEL WIRE

6.0L ALTERNATIVE FUEL PRESSURE SENSOR ALTERNATIVE FUEL RAIL PRESSURE/ TEMPERATURE SENSOR ALTERNATIVE FUEL SYSTEM DATA CONNECTOR ALTERNATIVE FUEL TANK TEMPERATURE SENSOR AUDIO AMPLIFIER AUDIO/ VIDEO INPUT ADAPTER AUXILIARY AUDIO INPUT BLK WIRE CENTER CONSOLE COMPARTMENT ACCESSORY POWER RECEPTACLE CENTER SEAT ACCESSORY POWER RECEPTACLE CNG CONTROL MODULE CNG HIGH PRESSURE REGULATOR TEMPERATURE SENSOR FUEL PUMP DISABLE CONTROL MODULE FUEL PUMP DISABLE RELAY HUMAN MACHINE INTERFACE CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INFO DISPLAY MODULE INSTRUMENT PANEL JUNCTION BLOCK MEDIA DISC PLAYER MID LEVEL UP LEVEL NCA WIRE PARKING ASSIST CONTROL MODULE PASSENGER BACK SEAT BLOWER MOTOR PASSENGER BACK SEAT HEATING ELEMENT PASSENGER CUSHION SEAT BLOWER MOTOR PASSENGER CUSHION SEAT HEATING ELEMENT PASSENGER DOOR HANDLE FLOOD LAMP PASSENGER DOOR LATCH ASSEMBLY PASSENGER DOOR LOCK SWITCH PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR CARGO LAMP PASSENGER OUTSIDE REAR VIEW MIRROR COURTESY LAMP PASSENGER OUTSIDE REAR VIEW MIRROR GLASS PASSENGER PRESENCE MODULE PASSENGER SEAT ADJUSTER SWITCH PASSENGER WINDOW SWITCH RADIO REAR VIEW CAMERA RIGHT MIDDLE SIDE MARKER LAMP RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RIGHT TURN SIGNAL REPEATER LAMP SEAT HEATING CONTROL MODULE TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE USB RECEPTACLE W/ COLOR LIGHT SENSITIVE W/ DRIVER, PASSENGER SPLIT SEAT W/ FRONT SEAT ADJUSTER W/ FRONT SEAT ADJUSTER W/O DRIVER, PASSENGER SPLIT SEAT W/ FRONT SEAT HEATER W/ ONSTAR W/ POWER OPERATED WINDOW W/ REAR SEAT ENTERTAINMENT PACKAGE W/O COLOR LIGHT SENSITIVE W/O DRIVER, PASSENGER SPLIT SEAT W/O FRONT SEAT ADJUSTER W/O POWER OPERATED WINDOW W/O POWER OPERATED WINDOW W/ POWER OPERATED WINDOW WHT WIRE

5-VOLT REFERENCE AIR TEMP DOOR CTRL LOW REF AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) ANTI-THEFT SYSTEM AUXILIARY HEATER CTRL AUXILIARY HEATER STATUS SIG BATT POSITIVE BATT POSITIVE VOLT BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MOTOR BLOWER MTR BLOWER MTR SPD CTRL BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM ELECTRIC VARIABLE DISPLACEMENT CTRL ELECTRIC VARIABLE DISPLACEMENT SPLY EXCEPT BASE EQUIPMENT BASE EQUIPMENT FRT BLWR FUSE GRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/RED WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER GLOVE BOX) HVAC/AUX HVAC IGN FUSE INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LINEAR INTERCONNECT NETWORK BUS 9 LOGIC LOW SPEED GMLAN SERIAL DATA PEPS/HVAC FUSE REAR DEFOG RLY CTRL RED/GRY WIRE RED/VIO WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN/CRANK IGN 1 VOLT SIG GND SPD CTRL VIO WIRE VIO/GRY WIRE VOLT WHT/BLU WIRE YEL/DK GRN WIRE

6.0L 6.6L A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE AIR INLET DOOR ACTUATOR AMBIENT AIR TEMPERATURE SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ELECTRICAL AUXILIARY HEATER ENGINE COOLANT LEVEL SWITCH ENGINE COOLANT TEMPERATURE GAUGE EXCEPT BASE EQUIPMENT BASE EQUIPMENT FUSE 1 GRN WIRE GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK LEFT AIR TEMPERATURE DOOR ACTUATOR LEFT MODE DOOR ACTUATOR LOGIC TEMP TEMP SENS SENS LOW SIG REF LOW COOLANT LEVEL IND MOST SERIAL DATA (+) RED/GRY WIRE VIO WIRE VIO/GRN WIRE VIO/GRY WIRE WHT WIRE WHT/GRN WIRE WHT/LT GRN WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/DK GRN WIRE

5 VOLT REF APPLY SIG AUX CTRL AUXILIARY CHASSIS CONTROL MODULE BATT POS VOLT BLK WIRE BLK/BRN WIRE BLU WIRE BLU/RED WIRE BRK CTRL SIG BRK ENABLE SIG BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE ECM IGN FUSE ENABLE SIG GAIN SIG GRN/BLK WIRE GRN/VIO WIRE GROUND HI SPD GMLAN SERIAL DATA HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED ICCM FUSE IGNITION 1 VOLT INSTRUMENT PANEL JUNCTION BLOCK LOW REF POWER DISTRIBUTION SYSTEM PPL/LT GRN WIRE RED/LT GRN WIRE RED/WHT WIRE SERIAL DATA BUS 14 TRAILER BRAKE CONTROL SWITCH TRAILER BRAKE POWER CONTROL MODULE TRLR BRK FUSE UNDERHOOD FUSE BLOCK VIO/LT GRN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE