Car Wiring Diagrams for Headlights circuit for GMC Sierra III facelift (2015-2018)

AIR CONDITIONING SYSTEM AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR AUTO B+ VOLT BCM 3 FUSE BCM 4 FUSE BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/VIO WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE FOG LAMP RLY CTRL FRONT FOG FRONT FOG LAMP SW SIG GRN/BRN WIRE GRN/GRY WIRE GRY/BLU WIRE HDLP DIMMER SW HI BEAM SIG HDLP HI BEAM RLY CTRL HDLP SW FLASH TO PASS SIG HDLP SW ON SIG HDLP OFF SIG CTRL HDLP SW PARK LP SIG HEAD HEADLAMP SWITCH HIGH SPD GMLAN SER DATA (-) 1 HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL JUNCTION BLOCK LEFT INSTRUMENT PANEL FUSE BLOCK LF HDLP LOW BEAM CTRL LH DRL CTRL LIGHT SWITCH LOW REF OFF PARK PARK BRAKE SWITCH PARK BRK SW SIG RED/DK BLU WIRE RED/GRY WIRE RH DRL CTRL RH HDLP LOW BEAM CTRL RIGHT INSTRUMENT PANEL FUSE BLOCK TURN SIGNAL/ MULTI-FUNCTION SWITCH W/ BASE EQUIPMENT W/O BASE EQUIPMENT WHT WIRE WHT/BLU WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE

AIR CONDITIONING SYSTEM AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/VIO WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE FOG LAMP FUSE FOG LAMP RLY CTRL FOG LAMP SW SIG FRONT FOG LAMP RELAY FUSE 2 GMC/ CHEVROLET GMLAN SERIAL DATA GRN/BRN WIRE GRN/GRY WIRE GRY/BLU WIRE HDLP DIMMER SW HI BEAM SIG HDLP HI BEAM RLY CTRL HDLP RT/LT FUSE HDLP SW ON SIG HDLP OFF SIG CTRL HDLP SW PARK LP SIG HEADLAMP HIGH BEAM RELAY HOT AT ALL TIMES HVAC CONTROL MODULE LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HIGH BEAM CONTROL MODULE LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LEFT HIGH BEAM HEADLAMP LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LEFT LOWER PARK/TURN SIGNAL LAMP LEFT PARK DAYTIME RUNNING LAMP LEFT UPPER PARK/TURN SIGNAL LAMP LF DRL SPLY VOLT LOGIC LOW REF LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE PARK BRAKE SW SIG PNK WIRE POS VOLT POWER DISTRIBUTION SYSTEM PPL RED WIRE RED/DK BLU WIRE RED/GRN WIRE RED/GRY WIRE RF DRL SPLY VOLT RH HDLP LOW BEAM SPLY VOLT LH HDLP LO BEAM SPLY VOLT HDLP SW FLASH TO PASS SIG TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE

BATTERY FUSE BLOCK BLK WIRE BLU/BRN WIRE BRN WIRE BRN/VIO WIRE DISTRIBUTION FOG LAMP FUSE FRONT FOG LAMP RELAY FUSE 2 GROUND DISTRIBUTION SYSTEM GRY/BLU WIRE HDLP RT/LT FUSE HEADLAMP HIGH BEAM RELAY HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT HEADLAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LEFT PARK DAYTIME RUNNING LAMP LOGIC MISC IGN FUSE NCA WIRE POWER RED/GRN WIRE SYSTEM UNDERHOOD FUSE BLOCK VIO/GRY WIRE W/ HIGH INTENSITY DISCHARGE W/O HIGH INTENSITY DISCHARGE W/O HIGH INTENSITY DISCHARGE W/ HIGH INTENSITY DISCHARGE CHEVROLET GMC WHT WIRE YEL WIRE YEL YEL WIRE

AUTO BCM 3 FUSE BCM 4 FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/VIO WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY FOG LAMP SW FRONT FOG LAMP IND GRN/BRN WIRE GRN/GRY WIRE GROUND HEAD HEADLAMP SWITCH HIGH BEAM IND HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT FRONT FOG LAMP LEFT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPD GMLAN SER DATA LT BLU WIRE LT GRN WIRE NCA WIRE OFF ORG/ WIRE PARK PARK BRAKE SWITCH PNK WIRE PPL RED WIRE RED/DK BLU WIRE RED/GRY WIRE RIGHT FRONT FOG LAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HIGH BEAM CONTROL MODULE RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT HIGH BEAM HEADLAMP RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT LOW BEAM HEADLAMP RIGHT LOWER PARK/TURN SIGNAL LAMP RIGHT PARK DAYTIME RUNNING LAMP RIGHT UPPER PARK/TURN SIGNAL LAMP VIO WIRE W/ BASE EQUIPMENT W/O BASE EQUIPMENT WHT WIRE WHT/VIO WIRE YEL WIRE

B+ VOLT BLK WIRE BLK/WHT WIRE BLU/BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY FRONT FOG LIGHT IND GROUND DISTRIBUTION SYSTEM HIGH BEAM IND HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPD GMLAN SER DATA LT GRN WIRE NCA WIRE RED/GRY WIRE RIGHT HEADLAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT LOW BEAM HEADLAMP RIGHT PARK DAYTIME RUNNING LAMP SIG GND VIO/GRY WIRE W/ HIGH INTENSITY DISCHARGE W/O DRIVER INFO ENHANCED DISPLAY INSTRUMENT W/O HIGH INTENSITY DISCHARGE WHT WIRE YEL WIRE

BLK WIRE BRN/VIO WIRE GROUND DISTRIBUTION SYSTEM LEFT FRONT FOG LAMP LEFT HEADLAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HIGH BEAM CONTROL MODULE LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LOGIC NCA WIRE W/ HIGH INTENSITY DISCHARGE W/O HIGH INTENSITY DISCHARGE W/O HIGH INTENSITY DISCHARGE W/ HIGH INTENSITY DISCHARGE WHT WIRE YEL WIRE

BLK WIRE BRN/VIO WIRE GROUND DISTRIBUTION SYSTEM LOGIC NCA WIRE RIGHT FRONT FOG LAMP RIGHT HEADLAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HIGH BEAM CONTROL MODULE RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT LOW BEAM HEADLAMP W/ HIGH INTENSITY DISCHARGE W/O HIGH INTENSITY DISCHARGE W/O HIGH INTENSITY DISCHARGE W/ HIGH INTENSITY DISCHARGE WHT WIRE YEL WIRE