GMC Sierra III facelift (2015-2018) yel/gry Wiring diagrams

5 VOLT REF 5 VOLT REF (1) TRACTION CTRL SW SIG AMBIENT LIGHT SENS SIG ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES, CRUISE CONTROL, EXTERIOR LIGHTS SYSTEMS ANTI-LOCK BRAKES, HEADLIGHTS, INSTRUMENT CLUSTER SYSTEMS BACKUP LAMP RLY CTRL BATT POSITIVE VOLT BATTERY POSITIVE VOLTAGE BCM 1 FUSE BCM 2 FUSE BCM 3 FUSE BCM 4 FUSE BCM 5 FUSE BCM 6 FUSE BCM 7 FUSE BCM 8 FUSE BLK WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/RED WIRE BLU/VIO WIRE BLU/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CARGO LAMP SW SIG CHILD LOCKOUT INDICATOR CTRL COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG CURRENT SENS LOW REF DIMMER SW LOW REF DIMMER SW SIG DK BLU WIRE DK BLU/VIO WIRE DOOR LOCKS, ANTI-THEFT SYSTEMS DRV DR LOCK SW LOCK SIG DRV DR LOCK SW UNLCK SIG EXHAUST BRAKE SW SIG SECURITY LOCK RLY CTRL EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS, INTERIOR LIGHTS SYSTEMS DOOR LOCKS, ANTI-THEFT SYSTEMS FOG LAMP RLY CTRL FRONT FOG LAMP SW SIG GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE HAZARD SWITCH SIG HEADLAMP OFF SIG CTRL HEADLAMP SW ON SIG HEADLAMP SW PARK LAMP SIG HEADLIGHTS SYSTEM HIGH BEAM RLY CTRL HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES INDICATOR DIMMING CTRL INTERIOR LAMP DEFEAT SW SIG LED BACKLIGHT DIMMING CTRL LEFT INSTRUMENT PANEL FUSE BLOCK LEFT TRAILER TURN SIG LAMP LIGHTING CONTROL 2 LT GRN/GRY WIRE NETWORK BUS 4 OUT OF PARK SIG PARK BRK SW SIG PARK LAMP RLY CTRL POWER DISTRIBUTION SYSTEM INTERIOR LIGHTS SYSTEM RED/BRN WIRE RED/DK BLU WIRE RED/GRY WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE REMOTE FUNCTION ACTR CTRL REMOTE FUNCTION ACTR RTN REMOTE FUNCTION ACTR TRANSMIT SIG RIGHT FRONT DRL CTRL RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT TRAILER TURN SIG LAMP RUN IGNITION 3 VOLT SEATS SYSTEM SECURITY INDICATOR CONTROL SENS LOW REF SERIAL DATA (+) (1) REMOTE FUNC ACTR RECEIVE SIG SERIAL DATA (-) (1) STARTING/CHARGING SYSTEM STOP LAMP SW SIG STOP/TURN LAMP CTRL TRAILER BRAKE APPLY SIG TURN SIGNAL LAMP CTRL VIO/BRN WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE WIPER SW HIGH SIG WIPER/WASHER SYSTEM YEL WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/GRY WIRE

BATTERY POSITIVE VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER BACK SEAT HEATING ELEMENT DRIVER CUSHION SEAT HEATING ELEMENT DRV HTD BACK ELE CTRL DRV HTD BACK NTC SIG DRV HTD NTC LO REF DRV HTD SEAT ELE CTRL DRV HTD SEAT ELE LOW REF DRV HTD SEAT NTC SIG DRV SEAT VENT MTR CTRL 1 GRN/BLU WIRE GRN/VIO WIRE GROUND GRY/BLK WIRE HOT AT ALL TIMES IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LT HTD CLD SEAT FUSE NETWORK BUS 2 PASS HTD BACK ELE CTRL PASS HTD BACK NTC LO REF PASS HTD BACK NTC SIG PASS HTD SEAT ELE CTRL PASS HTD SEAT ELE LOW REF PASS HTD SEAT NTC LO REF PASS HTD SEAT NTC SIG PASS SEAT VENT MTR CTRL 1 PASSENGER BACK SEAT HEATING ELEMENT PASSENGER CUSHION SEAT HEATING ELEMENT RED/GRN WIRE RED/GRY WIRE RED/LT GRN WIRE RH FRT HTD CLD SEAT FUSE SEAT HEATING CONTROL MODULE VIO/WHT WIRE W/ VENTILATION HEATER WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE YEL/GRY WIRE

5 VOLT REF AUTO BATT POS VOLT BCM 1 FUSE BCM 5 FUSE BCM 6 FUSE BLK WIRE BLK/BRN WIRE BLK/YEL WIRE BLU/RED WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRK SW SIG BRN WIRE BRN/WHT WIRE CHASSIS CONTROL MODULE CHILD LOCKOUT IND COMPUTER DATA LINES SYSTEM DIMMER SW SIG DK BLU WIRE DOME LAMP SWITCH GARAGE DOOR OPENER GMLAN SERIAL DATA GRN/GRY WIRE GRN/WHT WIRE GRY WIRE HEAD HEADLAMP SWITCH HOT AT ALL TIMES IND DIMMING CTRL INSTRUMENT PANEL JUNCTION BLOCK LED BACK LIGHT DIMMING CTRL LEFT FRONT OVERHEAD CONSOLE DOME/ READING LAMPS LEFT INSTRUMENT PANEL FUSE BLOCK LEFT REAR WINDOW SWITCH LMP RLY CTRL LOGIC LOW REF LT GRN/GRY WIRE LT GRN/YEL WIRE OFF PARK PARK LAMP SIG PASSENGER WINDOW SWITCH RED/BRN WIRE RED/WHT WIRE RIGHT FRONT OVERHEAD CONSOLE DOME/ READING LAMPS RIGHT INSTRUMENT PANEL FUSE BLOCK ROOF BEACON SWITCH SLIDING REAR WINDOW SWITCH SUNROOF SWITCH TRAILER BRAKE CONTROL SWITCH WHT WIRE YEL WIRE YEL/GRY WIRE

AUDIO AMPLIFIER (UNDER REAR OF CENTER CONSOLE) BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BRN/BLU WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DK BLU/YEL WIRE ENGINE CONTROLS SYSTEM GMLAN SERIAL DATA GRN WIRE GRN/BLK WIRE GROUND GRY/BLK WIRE GRY/BRN WIRE GRY/DK BLU WIRE GRY/GRN WIRE GRY/VIO WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LF SPKR LF SPKR 1 (-) LR SPKR LT GRN WIRE LT GRN/BLK WIRE LT GRN/BRN WIRE MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 SIG MOST CONTROL NCA WIRE REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/YEL WIRE REPLICATED SIG RF SPEAKER (+) LH/RR SUBWOOFER SPKR (+) MICROPHONE 3 LOW REF RF SPEAKER (-) RH SUBWOOFER SPKR (-) RF SPKR RF SPKR 1 (-) RIGHT FRONT DOOR SPEAKER RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPKR SERIAL DATA SUBWOOFER SPEAKER VIO/BRN WIRE VIO/DK BLU WIRE W/ PREMIUM WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE

BATT POS VOLT BLK WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY GRN/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LED DISABLE SIG LEFT MIDDLE FRONT PARKING ASSIST SENSOR LEFT MIDDLE REAR PARKING ASSIST SENSOR LEFT OUTER FRONT PARKING ASSIST SENSOR LEFT OUTER REAR PARKING ASSIST SENSOR LEFT/RIGHT/MID SENS LF CORNER PARKING CORNER SENS LF MIDDLE SENS SIG LO SPEED GMLAN SERIAL DATA CENTER DISPLAY 2 LOGIC LOW SPD GMLAN SERIAL DATA LR CORNER SENS SIG LR MIDDLE SENS SIG LT GRN WIRE PARKING ASSIST CONTROL MODULE PARKING ASSIST DISABLE IND PARKING ASSIST DISABLE SWITCH RED/GRN WIRE RF CORNER SENS SIG RF MIDDLE SENS SIG RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT MIDDLE FRONT PARKING ASSIST SENSOR RIGHT MIDDLE REAR PARKING ASSIST SENSOR RIGHT OUTER FRONT PARKING ASSIST SENSOR RIGHT OUTER REAR PARKING ASSIST SENSOR RR CORNER SENS SIG RR MIDDLE SENS SIG SENS LOW REF SENS OBJECT CTRL SIG GND REAR PARK ASSIST DISABLE SIG USB/OBS DET FUSE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/GRY WIRE YEL WIRE YEL/DK BLU WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

AUDIO AMPLIFIER (UNDER REAR OF CENTER CONSOLE) BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BRN/BLU WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DK BLU/YEL WIRE ENGINE CONTROLS SYSTEM GMLAN SERIAL DATA GRN WIRE GRN/BLK WIRE GROUND GRY/BLK WIRE GRY/BRN WIRE GRY/DK BLU WIRE GRY/GRN WIRE GRY/VIO WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LF SPKR LF SPKR 1 (-) LR SPKR LT GRN WIRE LT GRN/BLK WIRE LT GRN/BRN WIRE MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 SIG MOST CONTROL NCA WIRE REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/YEL WIRE REPLICATED SIG RF SPEAKER (+) LH/RR SUBWOOFER SPKR (+) MICROPHONE 3 LOW REF RF SPEAKER (-) RH SUBWOOFER SPKR (-) RF SPKR RF SPKR 1 (-) RIGHT FRONT DOOR SPEAKER RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPKR SERIAL DATA SUBWOOFER SPEAKER VIO/BRN WIRE VIO/DK BLU WIRE W/ PREMIUM WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE

BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE FUSE 2 GROUND DISTRIBUTION SYSTEM GRY/BRN WIRE HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES INSTRUMENT PANEL JUNCTION BLOCK LEFT TRAILER TURN SIG LAMP LT GRN/VIO WIRE RED/GRN WIRE RED/LT GRN WIRE RIGHT TRAILER TURN SIG LAMP TRAILER BRAKE APPLY SIG TRAILER BRAKE POWER CONTROL MODULE TRAILER BRAKE PROVISION (BLUNT CUT) TRAILER CONNECTOR TRLR BRK FUSE UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/LT GRN WIRE YEL/GRY WIRE

AUXILIARY BATTERY FUSE BLOCK BACKUP LAMPS CIRCUIT BLU WIRE BLU/WHT WIRE BLUNT CUT) FUSE 2 GRY/BRN WIRE HOT AT ALL TIMES LEFT TRAILER STOP/TURN SIGNAL LAMP RELAY LT GRN WIRE LT GRN/VIO WIRE RED/GRN WIRE RED/LT GRN WIRE REV LAMP FUSE RIGHT TRAILER STOP/TURN SIGNAL LAMP RELAY TRAILER BACKUP LAMPS RELAY TRAILER CAMPER PROVISION TRAILER PARK LAMPS RELAY TRLR BATT FUSE TRLR PRK LAMP FUSE TRLR STOP TRN LT FUSE TRLR STOP TRN RT FUSE UNDERHOOD FUSE BLOCK W/ SPECIAL EQUIPMENT W/O SPECIAL EQUIPMENT WHT WIRE WHT/LT GRN WIRE YEL/GRY WIRE

2 HI IND CTRL 4 HI IND CTRL 4 LO IND CTRL ACCY WAKEUP SERIAL DATA ACCY/ RUN CRNK FUSE AWD IND CTRL BATT + BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVE SW SIG DRIVER INFORMATION CENTER ASSEMBLY FRONT AXLE ACT CTRL FRONT AXLE ENGAGEMENT ACTUATOR FT AXLE ACTUATOR CTRL GEAR POSITION SENSOR GMLAN SERIAL DATA - 1 GRN/BLK WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INCREMENTAL ENCDR SENS RTN INCREMENTAL ENCDR SENS SPLY INCRMT ENCODER DIR SIG INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK LEFT INSTRUMENT PANEL FUSE BLOCK LOGIC MTR CLOCKWISE CTRL MTR COUNTER CLOCKWISE CTRL NEUTRAL IND CTRL POWER DISTRIBUTION SYSTEM RED/GRY WIRE ROTARY POS IMPULSE SIG ROTARY POS SENS RTN ROTARY POS SENS SIG RUN/CRANK IGN 1 VOLT SERIAL DATA (-) (1) TRANS IGN FUSE TRANSFER CASE CONTROL MODULE TRANSFER CASE LOCK SOL CTRL UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLK WIRE VIO/GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHEEL LOCK IND WHT WIRE WHT/GRN WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

2 HI 2-HI IND 4 HI 4-HI IND 4-LO IND AUTO BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BODY CONTROL MODULE BRN WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM CTRL DATA 1 (+) DK BLU WIRE GRN/BLK WIRE GRY/GRN WIRE GRY/RED WIRE IGN 3 ILL IND DIMMER NEUT 4 LO NEUTRAL IND POWER DISTRIBUTION SYSTEM RED/GRY WIRE SERIAL TRANSFER CASE MOTOR TRANSFER CASE SHIFT CONTROL SWITCH VIO WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/WHT WIRE WHT WIRE WHT/GRN WIRE YEL WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/VIO WIRE