GMC Sierra IV (2018-2022) backup lamp rly ctrl Wiring diagrams

AUTOMATIC TRANSMISSION ASSEMBLY (10 SPEED A/T) AUTOMATIC TRANSMISSION ASSEMBLY (6 SPEED A/T) BACKUP LAMP RLY CTRL BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLU WIRE BLU/BRN WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY ENGINE CONTROL MODULE FEEDBACK SIG GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES IGN IMS MODE CTRL LEFT BACKUP LAMP LEFT TAIL LAMP ASSEMBLY LOGIC NCA WIRE NEUTRAL SIGNAL ORG/ WIRE RED WIRE RED/YEL WIRE RIGHT BACKUP LAMP RIGHT TAIL LAMP ASSEMBLY SERIAL DATA (-) (1) SIG A SIG B SIG C SIG GND SIG P TRAILER BACKUP LAMPS RELAY TRANSMISSION CONTROL MODULE TRANSMISSION INTERNAL MODE SWITCH TRANSMISSION PARK/ TRANSMISSION RANGE SENSOR UNDERHOOD FUSE BLOCK VOLT SUPPLY A W/ LED W/O LED WHT WIRE WHT/BLU WIRE WHT/GRY WIRE YEL WIRE YEL/BLU WIRE YEL/GRY WIRE

AC POWER OUTLET AC POWER OUTLET ENABLE SIG AC POWER OUTLET 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 BLK WIRE BLK/GRN WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRAKE APPLY SENSOR BRAKE APPLY SENSOR SIG BRN WIRE BRN/BLK WIRE BRN/VIO WIRE BRN/WHT WIRE CARGO LAMP SW SIG COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG CURRENT SENS LOW REF DOOR LOCKS, ANTI-THEFT SYSTEMS ELECTRONIC POWER STEERING SYSTEM POWER DISTRIBUTION SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS, INTERIOR LIGHTS SYSTEMS DOOR LOCKS, ANTI-THEFT SYSTEMS FOG LAMP RLY CTRL FRONT FOOTWELL LIGHTING CTRL GMLAN SERIAL DATA GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND 18 GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HAZARD SWITCH SIG HEADLAMP SW OFF SIG HEADLAMP SW ON SIG HEADLAMP SW PARK LAMP SIG HEADLAMP SW REF HEADLAMP SW SIG HEADLIGHTS SYSTEM HIGH BEAM RLY CTRL HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES IGNITION MODE SW INDICATOR DIMMING CTRL LAMP DISABLE SW SIG LEFT HEADLAMP RELAY CTRL LEFT MINOR ENDGATE LF TURN SIGNAL LAMP CTRL LH TRAILER TURN SIG LAMP CTRL LIN BUS 4 LR STOP/TURN LAMP CTRL MAJOR ENDGATE HI RELAY CTRL MAJOR ENDGATE LOW RELAY CTRL OUT OF PARK SIGNAL PARK LAMP RLY CTRL POWER DISTRIBUTION SYSTEM READING LAMP CONTROL RECEIVER LOW REF RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE REMOTE FUNCTION ACTR CTRL REMOTE FUNCTION ACTR TRANSMIT SIG RIGHT FRONT DRL CTRL RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT MINOR ENDGATE RIGHT TRAILER TURN SIG LAMP RUN IGNITION 3 VOLT SECURITY INDICATOR CONTROL SENS LOW REF SERIAL DATA (+) (1) REMOTE FUNC ACTR RECEIVE SIG SERIAL DATA (-) (1) STARTING/CHARGING SYSTEM STEERING COLUMN LK STATUS SIG TASK LAMP SW SIG TRACTION CTRL SW SIG 1 TRAILER BRAKE APPLY SIG TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO/BRN WIRE VIO/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE WIPER SW HIGH SIG WIPER/WASHER SYSTEM YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/GRY WIRE

AC POWER OUTLET ENABLE AC POWER OUTLET SW SIG/ ALL WINDOWS OPEN SW SIG AIR CONDITIONING SYSTEM AMBIENT LIGHT SENS SIG ANTI-LOCK BRAKES SYSTEM AUTO STOP START IND CTRL AUTO STOP START SWITCH SIG BACKUP LAMP RLY CTRL BATT POSITIVE VOLT BATTERY POSITIVE VOLTAGE BLK WIRE BLK/BRN WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT END OF DASH) BRAKE APPLY SENS CTRL BRAKE APPLY SENS LOW REF BRAKE APPLY SENS SIG BRN WIRE BRN/BLK WIRE BRN/VIO WIRE BRN/WHT WIRE CARGO LAMP SW SIG COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG CURRENT SENS LOW REF DOOR LOCKS SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS DOOR LOCKS, SHIFT INTERLOCK SYSTEMS EXTERIOR LIGHTS, ANTI-LOCK BRAKES, CRUISE CONTROL, SHIFT INTERLOCK SYSTEMS EXTERIOR LIGHTS, CRUISE CONTROL, SHIFT INTERLOCK SYSTEMS FOG LAMP RLY CTRL GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HAZARD SW SIG HEADLAMP SW ON SIG HEADLAMP SW PARK LAMP SIG HEADLIGHTS SYSTEM HEADLIGHTS, EXTERIOR LIGHTS SYSTEMS HEADLIGHTS, INTERIOR LIGHTS SYSTEMS HORN RLY CTRL AC POWER OUTLET STATUS INDICATOR CTRL HORNS SYSTEM HOT AT ALL TIMES IGN MODE SW ACCESSORY LED SIG IGN MODE SW MODE VOLTAGE IGN MODE SW START LED SIG INDICATOR DIMMING CTRL INTERIOR LAMP CTRL INTERIOR LAMP DEFEAT SW SIG LED AMBIENT LIGHTING CTRL 2 LEFT HEADLAMP RELAY CTRL LEFT MINOR ENDGATE AJAR SIG LEFT TRAILER TURN SIG LAMP CTRL LIGHTING CTRL SWITCH REF LIGHTING CTRL SWITCH SIG LOW SPEED GMLAN SERIAL DATA MAJOR ENDGATE HIGH RELAY CTRL MAJOR ENDGATE LOW RELAY CTRL NETWORK BUS 4 OUT OF PARK SIG PARK LAMP RLY CTRL POWER DISTRIBUTION SYSTEM POWER WINDOWS SYSTEM RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE REMOTE FUNCTION ACTR CTRL REMOTE FUNCTION ACTR LO REF REMOTE FUNCTION ACTR TRANSMIT SIG RIGHT FRONT DRL CTRL RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT MINOR ENDGATE AJAR SIG RIGHT TRAILER TURN SIG LAMP CTRL HEADLAMP HIGH BEAM RLY CTRL RUN IGNITION 3 VOLT DOME LAMP OFF INDICATOR CTRL SECURITY INDICATOR CTRL SERIAL DATA (+) (1) REMOTE FUNC ACTR RECEIVE SIG SERIAL DATA (-) (1) STARTING/CHARGING SYSTEM STEERING COLUMN LOCK STATUS SIG STOP/TURN LAMP CTRL SW HEADLAMPS OFF SIG CTRL TASK LAMP SW SIG TRACTION CTRL SW SIG 1 TRAILER BRAKE APPLY SIG TRUNK, TAILGATE, FUEL DOORS SYSTEM TURN SIGNAL LAMP CTRL VIO/BRN WIRE VIO/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE WIPER SW HIGH SIG WIPER/WASHER SYSTEM POWER DISTRIBUTION SYSTEM YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/GRY WIRE