GMC Sierra III facelift (2015-2018) red Wiring diagrams

A/C EVAPORATOR TEMPERATURE SENSOR A/C IND A/C SWITCH AUTO IND AUTO SWITCH BLK WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DEFROST IND DEFROST SWITCH DEFROST, LOWER AIR OUTLET IND DEFROST, LOWER AIR OUTLET SWITCH DUCT LEFT LOWER AIR TEMPERATURE SENSOR DUCT LEFT UPPER AIR TEMPERATURE SENSOR DUCT RIGHT LOWER AIR TEMPERATURE SENSOR DUCT RIGHT UPPER AIR TEMPERATURE SENSOR ELECTRICAL AUXILIARY HEATER EXCEPT BASE EQUIPMENT BASE EQUIPMENT GMLAN GRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/RED WIRE INFO DISPLAY MODULE INSTRUMENT PANEL JUNCTION BLOCK LEFT TEMPERATURE CONTROL SWITCH LOGIC LOWER AIR OUTLET IND LOWER AIR OUTLET SWITCH REAR DEFOGGER IND REAR DEFOGGER SWITCH RECIRCULATION IND RECIRCULATION SWITCH RED WIRE RED/GRY WIRE RIGHT TEMPERATURE CONTROL SWITCH START/ STOP SWITCH SYNC IND SYNC SWITCH UPPER AIR OUTLET IND UPPER AIR OUTLET SWITCH UPPER, LOWER AIR OUTLET IND UPPER, LOWER AIR OUTLET SWITCH VENTILATION FAN SWITCH VIO WIRE VIO/GRY WIRE YEL 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 AIR TEMP DOOR CONTROL AIR TEMP DOOR POSITION SIG AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLU WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE COOLANT LEVEL SWITCH ENGINE COOLANT TEMPERATURE GAUGE EVAP CORE TEMP SENSOR SIG GRN WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE HVAC CONTROL MODULE (BEHIND UPPER GLOVE BOX) INSTRUMENT CLUSTER LEFT AIR TEMPERATURE DOOR ACTUATOR LEFT MODE DOOR ACTUATOR LOGIC LOW COOLANT LEVEL IND LOWER LEFT AIR TEMP SENS SIG LOWER RIGHT AIR TEMP SENS SIG MODE 1 VALVE POSITION SENSOR SIG MODE DOOR CONTROL MOST SERIAL DATA (+) PASS AIR TEMP DOOR CTRL PASS AIR TEMP DOOR POSITION SIG PASS AIR TEMP MOTOR CTRL RECIRCULATION DOOR CONTROL RECIRCULATION DOOR POSITION SIG RED WIRE RIGHT AIR TEMPERATURE DOOR ACTUATOR SENS LOW REF TEMP TEMP SENS SENS LOW SIG REF UPPER LEFT AIR TEMP SENS SIG UPPER RIGHT AIR TEMP SENS SIG VIO/GRN WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/LT GRN WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

A/C CMPRSR MDL/BATT RVC FUSE B+ VOLT BASE EQUIPMENT BLK WIRE BLK/WHT WIRE BLU/YEL WIRE BRN WIRE COMBINED VEHICLE INERTIAL SENSOR SUPPLY VOLT COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DK GRN WIRE DRIVER INFORMATION CENTER DISPLAY ELECTRONIC BRAKE CONTROL MODULE EXCEPT BASE EQUIPMENT GROUND GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT PRESSURE SENSOR LOGIC LOW REF LOW SPD GMLAN SERIAL DATA 2 LT GRN/BRN WIRE NCA WIRE POWER STEERING CONTROL MODULE (ON POWER STEERING RACK ASSEMBLY) POWER STEERING PRESSURE SENSOR RED WIRE RED/WHT WIRE RIGHT PRESSURE SENSOR SERIAL DATA COMMUNICATION ENABLE SIGNAL GROUND STEERING SOL CONTROL STEERING SOL LOW REF STEERING WHEEL ANGLE SENSOR UNDERHOOD FUSE BLOCK VARIABLE POWER STEERING SOLENOID VALVE WHT WIRE WHT/DK BLU WIRE

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

BATTERY FUSE BLOCK BLK WIRE BODY CONTROL MODULE BRN WIRE BRN/WHT WIRE FUSE 2 GRN WIRE GRN/WHT WIRE GRY WIRE HORN HORN FUSE HORN RELAY HORN RLY CTRL HORN SW SIG HORN SWITCH HOT AT ALL TIMES POWER DISTRIBUTION SYSTEM RED WIRE STEERING WHEEL AIR BAG COIL UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE

6.0L 6.0L (VIN G) ACC IGN VOLT AUXILIARY CHASSIS CONTROL MODULE BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLK WIRE BODY CONTROL MODULE CHASSIS CONTROL MODULE CHG IND CTRL DK BLU WIRE DLIS FUSE DRIVER SEAT ADJUSTER SWITCH DRIVER WINDOW MOTOR DRVR PWR SEAT FUSE ECM IGN FUSE ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY EXTENDED CAB CREW CAB FROM ACCY PWR MDL/TPIM PUMP FUSE (DIAGRAM 3 OF 7) FROM LEFT INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 6 OF 7) FROM UNDERHOOD FUSE BLOCK (DIAGRAM 3 OF 7) FRONT AXLE ENGAGEMENT ACTUATOR FUEL PUMP 2 FUSE FUEL PUMP DRIVER CONTROL MODULE GARAGE DOOR OPENER GLOW PLUG CONTROL MODULE GRN WIRE GRN/VIO WIRE IGNITION MAIN RELAY IGNITION SWITCH J124 (6.0L) J123 (6.6L) KEY-IN IGNITION SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK LEFT REAR WINDOW SWITCH LT DRS FUSE MISC IGN FUSE MOBILE DEVICE WIRELESS CHARGER MODULE OFF PNK WIRE PPL/LT GRN WIRE RED WIRE RED/BLU WIRE RED/DK BLU WIRE RED/YEL WIRE ROOF BEACON SWITCH RUN WIRE SEAT MEMORY CONTROL MODULE SECONDARY FUEL PUMP RELAY TO CONFIGURABLE PROVISION RELAY 4 (DIAGRAM 7 OF 7) TO PRK ENBL/ EAP FUSE (DIAGRAM 6 OF 7) TRANS IGN FUSE TRANSMISSION CONTROL MODULE UGDO/ ISRVM FUSE UNDERHOOD FUSE BLOCK VIO/BLK WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE W/ ROOF MOUNTED PROVISION W/O ROOF MOUNTED PROVISION WHT/BLK WIRE WHT/VIO WIRE

6.0L 6.0L (VIN B) 6.0L (VIN G) A/C COMPRESSOR CLUTCH RELAY A/T ABS PUMP FUSE ABS VLV FUSE AC CLTCH FUSE ACCY PWR MDL/TPIM PUMP FUSE AHA/AHA RVC (6.0L) A/C CMPRSR MDL/BATT RVC (6.6L) FUSE ALTERNATIVE FUEL FUSE HOLDER 1 ALTERNATIVE FUEL FUSE HOLDER 2 ALTERNATIVE FUEL INJECTOR RELAY ALTERNATIVE FUEL SYSTEM DATA CONNECTOR ASSIST STEP CONTROL MODULE AUXILIARY CHASSIS CONTROL MODULE BASE EQUIPMENT BLUNT CUT) BODY CONTROL MODULE CHASSIS CONTROL MODULE CNG CONTROL MODULE ELC RNG BDS FUSE ELEC PRK BRK FUSE ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROL MODULE ESC ELC EXH FUSE EVAPORATIVE EMISSION VENT SOLENOID VALVE EXCEPT BASE EQUIPMENT FPPM FUSE FROM AUXILIARY BATTERY FUSE BLOCK (DIAGRAM 1 OF 7) FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 7) FRONT FOG LAMP RELAY FRT/WPR FUSE FUEL HEATER FUSE FUEL HEATER RELAY FUEL PUMP DRIVER CONTROL MODULE FUEL PUMP FUSE FUEL PUMP RELAY FUSE HEADLAMP HIGH BEAM RELAY HORN RELAY I/P BEC 1 FUSE I/P BEC 2 FUSE ICCM FUSE INSTRUMENT PANEL JUNCTION BLOCK INT HTR FUSE LEFT TRAILER STOP/TURN SIGNAL LAMP RELAY LT GRN WIRE MSB DRVR FUSE MSB PASS FUSE REAR DEFOGGER RELAY RED WIRE RED/BRN WIRE RED/DK BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE REDUCTANT CONTROL MODULE RIGHT TRAILER STOP/TURN SIGNAL LAMP RELAY STARTER RELAY STOP LAMP RELAY STRTR FUSE SUSPENSION CONTROL MODULE TCM/ECM FUSE TO AUXILIARY BATTERY RELAY 1 (DIAGRAM 1 OF 7) TO ENGINE CONTROLS IGNITION RELAY (DIAGRAM 2 OF 7) TO LEFT INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 7) TO LEFT INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 4 OF 7) TRAILER BACKUP LAMPS RELAY TRAILER BRAKE POWER CONTROL MODULE TRAILER BRAKE PROVISION TRAILER CAMPER PROVISION TRAILER CONNECTOR TRAILER PARK LAMPS RELAY TRANSFER CASE CONTROL MODULE TRANSMISSION CONTROL MODULE TRLR BATT FUSE TRLR BRK FUSE UNDERHOOD FUSE BLOCK W/ AUXILIARY BATTERY W/ SPECIAL EQUIPMENT W/O AUXILIARY BATTERY W/O SPECIAL EQUIPMENT WINDSHIELD WASHER PUMP RELAY WINDSHIELD WIPER RELAY WINDSHIELD WIPER SPEED CONTROL RELAY

ACCY/RUN CRNK FUSE APO 1/LTR FUSE APO 2 FUSE APO 3 FUSE APO 4 FUSE APO/BATT FUSE APO/RAP FUSE BLK WIRE BODY CONTROL MODULE CENTER CONSOLE COMPARTMENT ACCESSORY POWER RECEPTACLE CENTER CONSOLE REAR ACCESSORY POWER RECEPTACLE CENTER SEAT ACCESSORY POWER RECEPTACLE COLLISION ALERT INDICATORS ELECTRICAL AUXILIARY HEATER FORWARD ADJUSTABLE PEDAL RELAY FROM LT DRS FUSE (DIAGRAM 2 OF 7) FROM USB/OBS DET FUSE (DIAGRAM 5 OF 7) GRN/VIO WIRE GRY WIRE GRY/VIO WIRE HTD WHL FUSE HVAC CONTROL MODULE HVAC/AUX HVAC IGN FUSE IGNITION MAIN RELAY INSIDE REAR VIEW MIRROR INSTRUMENT CLUSTER INSTRUMENT PANEL 1 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL 2 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH IPC IGN/SDM IGN FUSE LEFT INSTRUMENT PANEL FUSE BLOCK NCA WIRE PASSENGER AIR BAG DISABLED INDICATOR PRK ENBL/ EAP FUSE REAR VIEW CAMERA REARWARD ADJUSTABLE PEDAL RELAY RED WIRE RED/BRN WIRE RED/WHT WIRE RETAINED ACCESSORY POWER RELAY 1 RETAINED ACCESSORY POWER RELAY 2 RIGHT INSTRUMENT PANEL FUSE BLOCK SEO ALC FUSE SEO RAP FUSE SLIDING REAR WINDOW SWITCH SPARE FUSE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE SUNROOF MOTOR TO MOBILE DEVICE WIRELESS CHARGER MODULE (DIAGRAM 2 OF 7) TO UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 7) TRANSFER CASE CONTROL MODULE TRANSMISSION PARK POSITION RELAY UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLK WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE W/O FRONT COMPARTMENT CONSOLE YEL WIRE

BASE EQUIPMENT BCM 3 FUSE BLK WIRE BLK/ORG WIRE BRAKE FLUID LEVEL SWITCH BRAKE IND BRK FLUID LVL COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DLIS FUSE DRIVER INFORMATION CENTER DISPLAY DRIVER SEAT BELT SW LO REF DRIVER SEAT BELT SW SIG DRIVER SEAT BELT SWITCH DRIVER SEAT BELT BUCKLE DRIVER SEAT POS SW SIG DRIVER SEAT POSITION SENSOR ELECTRONIC BRAKE CONTROL MODULE EXCEPT BASE EQUIPMENT GMLAN SER DATA (-) (2) GRN/GRY WIRE GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK IPC IGN/ SDM IGN FUSE KEY-IN IGNITION SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN SER DATA LOGIC NCA WIRE OFF ORG/BLU WIRE ORG/BRN WIRE ORG/GRN WIRE ORG/VIO WIRE PASS SEAT BELT IND PASS SEAT BELT SW LO REF PASS SEAT BELT SWITCH SIG PASS SEAT POSITION SWITCH SIG PASSENGER AIR BAG DISABLED INDICATOR PASSENGER SEAT BELT SWITCH PASSENGER SEAT BELT BUCKLE PASSENGER SEAT POSITION SENSOR POWER DISTRIBUTION SYSTEM RED WIRE RED/BLU WIRE RED/GRY WIRE RUN WIRE RUN/CRANK SEAT BELT IND SEAT BELT ON IND TIRE PRESSURE IND VIO WIRE VIO/BLK WIRE VIO/WHT WIRE WHT WIRE WHT/VIO WIRE

BATT POS VOLT BCM 1 FUSE BCM 2 FUSE BLK WIRE BLK/GRY WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN/GRY WIRE BRN/LT GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY FRT WASH FUSE FRT WPR FUSE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HI LO HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK J124 (EXCEPT 6.6L) J123 (6.6L) LEFT INSTRUMENT PANEL FUSE BLOCK LO WASHER FLUID IND CTRL LOGIC LOW REF MIST MIST HI OFF LO INT INT MTR PARK SW SIG OFF RED WIRE RED/BRN WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA (-) (1) SERIAL DATA 2 TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK VIO WIRE W/ BASE EQUIPMENT W/O BASE EQUIPMENT WASHER RLY CTRL WASHER SW SIG WASHER SWITCH WHT WIRE WHT/BLK WIRE WHT/VIO WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER PUMP WINDSHIELD WASHER PUMP RELAY WINDSHIELD WIPER MOTOR WINDSHIELD WIPER MTR RLY COIL SUPPLY VOLT WINDSHIELD WIPER RELAY WINDSHIELD WIPER SPEED CONTROL RELAY WINDSHIELD WIPER SW HI SIG WIPER SW HI SIG WIPER SW LOW SIG WIPER SWITCH YEL/BLU WIRE YEL/BRN WIRE