GMC Sierra IV (2018-2022) blu 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

12 VOLT REFERENCE ACCESSORY VOLT ACCESSORY WAKEUP SER DATA ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM BATT POSITIVE VOLT BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/YEL WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CARGO LAMP CONTROL COMPUTER DATA LINES SYSTEM COURTESY LAMP SW SIG CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM WIPER/WASHER SYSTEM CTRL SW SIG CURRENT SENS CTRL CURRENT SENS SIG DIMMER SW HIGH BEAM SIG DOOR LOCK ACTUATOR DOOR LOCK CTRL DOOR LOCK CTRL 2 DOOR LOCK KEY SW UNLOCK SIG DOOR LOCK SW LOCK SIG DOOR LOCK SW UNLOCK SIG DOOR LOCKS, ANTI-THEFT SYSTEMS DOOR LOCKS, ANTI-THEFT, INTERIOR LIGHTS SYSTEMS ELECTRONIC MUFFLERS SYSTEM ENDGATE HIGH RELAY CTRL EXHAUST BRAKE SW INDICATOR EXTERIOR LIGHTS, INTERIOR LIGHTS SYSTEMS GAP UP/DOWN SW SIG GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GROUND 23 GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/VIO WIRE HAZARD SW LEFT TURN SIG HAZARD SWITCH RIGHT TURN SIG HDLP SW FLASH TO PASS SIG HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM HORNS SYSTEM HI SPEED GMLAN SER DATA (-) 1 HIGH BEAM AUTO ON/OFF SW SIG HOOD STATUS B SIG HORN SW SIG HOT AT ALL TIMES IGNITION KEY RESISTOR SIG IGNITION MODE SW IGNITION SWITCH IMMOBILIZER CTRL IMMOBILIZER LOW REF INADVERTENT POWER CTRL KEY-IN IGNITION SWITCH LED AMBIENT LIGHTING CTRL LED BACK LT DIMMING CTRL LF DOOR AJAR SW SIG LF DRL CTRL LH HDLMP LOW BEAM CTRL LH TAIL LAMP FEEDBACK SIG LIN BUS 1 LIN BUS 2 LIN BUS 3 LIN BUS 5 LOCK CTRL LOCK SOLENOID ACTUATOR CTRL LOW REFERENCE MAJOR ENDGATE RELEASE SW MINOR ENDGATE LOW RELAY MINOR ENDGATE RELEASE SW MIRR CARGO LAMP CTRL OFF OFF/RUN/CRANK VOLT POWER DISTRIBUTION SYSTEM PUDDLE LAMP CONTROL PUDDLE LAMP CTRL RAP RELAY COIL CTRL REAR LICENSE LP CTRL RED/YEL WIRE RF DOOR AJAR SW SIG RF TURN SIG LP CTRL RH DETECTION SIG RH HDLMP LOW BEAM CTRL RR TURN SIG LP CTRL RUN WIRE RUN/CRANK IGNITION 1 VOLT RUN/CRANK RELAY COIL CTRL SERIAL DATA COMM ENABLE SET/COAST/RESUME/ ACCELERATE SW SIG SHIFT INTERLOCK SOLENOID CTRL SHIFT INTERLOCK SYSTEM SHIFT INTERLOCK, MEMORY SYSTEMS SHIFT SELECT SW PARK SIG SHIFT SELECT SW SIG 16 17 TRAILER BRAKE APPLY SIG STANDING LAMP RLY CTRL STARTING/CHARGING SYSTEM STOP LP RLY COIL CTRL SURVEILLANCE SW SIG TAP UP/TAP DOWN SW SIG TRANSMISSIONS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM UNLOCK CTRL VIO/BLK WIRE VIO/BLU WIRE VIO/GRY WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE WHT/VIO WIRE WHT/YEL WIRE WINDSHIELD WASHER RLY CTRL WINDSHIELD WASHER SW SIG WINDSHIELD WIPER SW LOW SIG WIPER MTR PARK SW SIG WIPER RELAY COIL CTRL WIPER SW HIGH SIG WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM POWER DISTRIBUTION SYSTEM WIRELESS CHARGER YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/VIO WIRE YEL/WHT WIRE

6.6L TURBO DIESEL BASE EQUIPMENT BATT POSITIVE VOLT 21 BATT POSITIVE VOLT 25 BATT POSITIVE VOLT 27 BATT POSITIVE VOLT 34 BLK WIRE BLK/BRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BPP SENS LO REF BPP SENS SIG BRAKE APPLY SENS LOW REF BRAKE APPLY SENS VOLT REF BRAKE APPLY SENSOR SIG BRAKE PEDAL POSITION SENSOR BRN/GRN WIRE BRN/WHT WIRE CARGO LAMP CTRL CARGO LAMP SW SIG CHEVROLET COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE EXCEPT BASE EQUIPMENT GMC GMLAN DATA - (1) GND 18 GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HAZARD SW LT TURN SIG HAZARD SW RT TURN SIG HAZARD SW SIG HAZARD SWITCH HEADLAMP SW PARK LAMP SIG HOT AT ALL TIMES LEFT LICENSE PLATE LAMP LF TURN SIG LAMP CTRL LH TAIL LAMP FEEDBACK SIG LICENSE PLATE LAMP LR STOP/TURN LAMP CTRL MIRR CARGO LAMP CTRL PARK LAMP RELAY CTRL PUDDLE LAMP CTRL REAR LICENSE LAMP CTRL RED WIRE RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE RH TAIL LAMP FEEDBACK SIG RH TURN SIG LAMP CTRL RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT LICENSE PLATE LAMP RR STOP/TURN LAMP CTRL SER DATA (-) (1) SHIFT INT SOL ACT CTRL STANDING LAMP RELAY CTRL STOP LP RLY COIL CTRL TASK LAMP SW SIG VEHICLE STABILITY CONTROL SWITCH VIO/BLU WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE WHT/VIO WIRE YEL/BLK WIRE YEL/BLU WIRE

6.6L TURBO DIESEL BACKUP LAMPS CIRCUIT BASE EQUIPMENT BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT BACKUP LAMP LEFT CARGO LAMP LEFT LOWER TAIL/STOP, TURN SIGNAL LAMP LEFT REAR SIDE MARKER LAMP LEFT TAIL LAMP ASSEMBLY LEFT TAIL/STOP, TURN SIGNAL LAMP LEFT UPPER TAIL/STOP, TURN SIGNAL LAMP NCA WIRE RED WIRE RED/GRN WIRE RED/WHT WIRE RIGHT CARGO LAMP RIGHT INSTRUMENT PANEL FUSE BLOCK VIO/BLK WIRE VIO/GRY WIRE VIO/WHT WIRE W/ LED W/O LED WHT/VIO WIRE YEL/BLU WIRE

BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CHEVROLET DRIVER OUTSIDE REAR VIEW MIRROR CARGO LAMP DRIVER OUTSIDE REAR VIEW MIRROR FORWARD EXTERIOR FLOOD LAMP DRIVER OUTSIDE REAR VIEW MIRROR LOWER EXTERIOR FLOOD LAMP DRIVER OUTSIDE REAR- VIEW MIRROR ENDGATE MARKER LAMP GMC GRN/VIO WIRE GRY/BRN WIRE GRY/GRN WIRE LEFT MIDDLE SIDE MARKER LAMP LEFT TURN SIGNAL REPEATER LAMP NCA WIRE ORG/ WIRE ORG/WHT WIRE PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR CARGO LAMP PASSENGER OUTSIDE REAR VIEW MIRROR FORWARD EXTERIOR FLOOD LAMP PASSENGER OUTSIDE REAR VIEW MIRROR LOWER EXTERIOR FLOOD LAMP RED/GRN WIRE RIGHT FENDER REAR SIDE MARKER LAMP RIGHT FRONT REAR FENDER CLEARANCE LAMP RIGHT MIDDLE SIDE MARKER LAMP RIGHT REAR FENDER CLEARANCE LAMP RIGHT TURN SIGNAL REPEATER LAMP VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/VIO WIRE YEL/BLK WIRE

BASE BASE EQUIPMENT BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CHEVROLET EXCEPT BASE EXCEPT BASE EQUIPMENT GMC GRN/VIO WIRE GRY WIRE GRY/BRN WIRE HEADLIGHTS SYSTEM PARK LAMPS RELAY RED/GRN WIRE RIGHT FENDER FRONT SIDE MARKER LAMP RIGHT FRONT SIDE MARKER LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT PARK/ TURN SIGNAL LAMP STOP LAMP RELAY TRAILER TOW CIRCUIT UNDERHOOD FUSE BLOCK VIO/GRY WIRE VIO/WHT WIRE W/ LED W/ SINGLE REAR WHEEL, RIDE, HANDLING CHASSIS W/O LED W/O SINGLE REAR WHEEL, RIDE, HANDLING CHASSIS

AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR BATT POS VOLT 21 BATT POS VOLT 25 BATT POS VOLT 29 BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN/VIO WIRE BRN/WHT WIRE CHEVROLET COMPUTER DATA LINES SYSTEM DIMMER SWITCH FLASH TO PASS FOG LAMP RLY CTRL FRONT TURN SIG LAMP FEEDBACK SIG GMC GMLAN SERIAL DATA - 1 GND 18 GRN WIRE GRN/BRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/BLU WIRE HAVC CONTROL HDLP HI BEAM RLY CTRL HDLP SW FLASH SIG HI BEAM SELECT SW HI BEAM SIG HDLP SW ON SIG HDLP SW OFF SIG HDLP SW REF HDLP SW SIG HIGH BEAM ASSIST HIGH BEAM AUTO ON/OFF SWITCH SIGNAL HOT AT ALL TIMES HVAC CONTROL MODULE LEFT HDLP RLY CTRL LEFT HEADLAMP ASSEMBLY LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LF DRL CTRL LH HDLP LOW BEAM CTRL LOW REFERENCE LOW SPEED GMLAN MODULE LIN BUS 1 RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RF DOOR AJAR SW SIG RH HDLP LOW BEAM CTRL RIGHT FRONT DRL CTRL RIGHT HEADLAMP ASSEMBLY RIGHT HIGH BEAM HEADLAMP RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT LOW BEAM HEADLAMP SERIAL DATA SOLAR SENSOR TURN SIGNAL/ MULTI-FUNCTION SWITCH VIO/BLK WIRE W/ LED W/O LED WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE

BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/VIO WIRE BRN/WHT WIRE CHEVROLET FRONT FOG LAMP RELAY GMC GRN/BRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLU WIRE HEADLAMP HIGH BEAM RELAY HEADLAMP RELAY HOT AT ALL TIMES LEFT DAYTIME RUNNING LAMP, LEFT HEADLAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RED/GRN WIRE RIGHT DAYTIME RUNNING LAMP RIGHT HEADLAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE UNDERHOOD FUSE BLOCK VIO/BLK WIRE W/ LED W/O LED WHT WIRE WHT/BRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE

BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY FRONT FOG LIGHT IND GMC GND 18 GRN/BRN WIRE GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HIGH BEAM IND HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT DAYTIME RUNNING LAMP, LEFT FRONT FOG LAMP LEFT HEADLAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LOGIC LOGIC (W/ BASE) LOW SPD GMLAN SERIAL DATA 2 RIGHT DAYTIME RUNNING LAMP RIGHT FRONT FOG LAMP RIGHT HEADLAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN/CRANK IGN 1 VOL 16 VIO WIRE VIO/BLK WIRE W/ BASE W/O BASE WHT WIRE WHT/BRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/GRY WIRE