GMC Sierra IV (2018-2022) red/blu Wiring diagrams

3.0L TURBO DIESEL ACCEL PEDAL POS LO REF 1 ACCEL PEDAL POS SIG 1 ACCL PEDAL POS 5 VOLT REF 1 ACCL PEDAL POS 5 VOLT REF 2 ACCL PEDAL POS LOW REF 2 ACCL PEDAL POS SIG 2 ADAPTIVE CRUISE CTRL GAP UP/DOWN SW SIG CRUISE CTRL SET/COAST/ RES/ACC SW SIG BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRK APPLY SENS CTRL BRK APPLY SENS LOW REF BRK APPLY SENS SIG BRK POSI SENS SIG BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE/ETC/TCC BRAKE SIGNAL ENG CTRL SENS 5 VOLT REF (3) ENG CTRL SENS 5 VOLT REF 2 ENGINE CONTROL MODULE (BEHIND LEFT HEADLAMP ASSEMBLY) EXCEPT 2.7L TURBO 2.7L TURBO EXCEPT 3.0L TURBO DIESEL GRN/WHT WIRE GROUND GRY/GRN WIRE HI SPD GMLAN SRL DATA (-) (1) HIGH SPEED GMLAN DATA (-) 1 HOT AT ALL TIMES LOGIC LOW REFERENCE RED/BLU WIRE RED/BRN WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SIG GND THRTL ACTR CTRL CLOSE THRTL ACTR CTRL OPEN THRTL POS SENS 5 VOLT REF THRTL POS SENS SIG 1 UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE BLU/VIO WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE CENTER PICKUP BOX ENDGATE LATCH COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY EXTERIOR PICKUP BOX ENDGATE CONTROL SWITCH GRN WIRE GRN/BLK WIRE GROUND GRY WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT INSTRUMENT PANEL FUSE BLOCK LEFT PICKUP BOX ENDGATE LATCH LEFT PICKUP BOX ENDGATE LATCH RELAY LO SPD GMLAN SERIAL DATA LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 12 LOGIC MAJOR ENDGATE HIGH RELAY CONTROL MAJOR ENDGATE LOW RELAY CONTROL MAJOR ENDGATE REL SW DISCRETE SIG EXTR MAJOR ENDGATE REL SW SIG EXTR MAJOR ENDGATE REL SW SIG INTR PICKUP BOX ENDGATE UNLATCH SWITCH RED/BLU WIRE RIGHT END OF DASH) RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT PICKUP BOX ENDGATE LATCH RIGHT PICKUP BOX ENDGATE LATCH RELAY VEHICLE STABILITY CONTROL SWITCH W/ ENHANCED WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN/BLK WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY EXTERIOR PICKUP BOX ENDGATE CONTROL SWITCH GRN WIRE GRN/BLK WIRE GROUND GRY/BLU WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT INSTRUMENT PANEL FUSE BLOCK LEFT PICKUP BOX AUXILIARY ENDGATE LATCH LEFT PICKUP BOX AUXILIARY ENDGATE LATCH RELAY LH MINOR ENDGATE AJAR SIG LO SPD GM LAN SERIAL DATA LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 12 LOGIC MINOR ENDGATE HI RLY CTRL MINOR ENDGATE LOW RLY CTRL MINOR ENDGATE REL SWITCH DISCRETE SIGNAL EXTERIOR RED/BLU WIRE RH MINOR ENDGATE AJAR SIG RIGHT END OF DASH) RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT PICKUP BOX AUXILIARY ENDGATE LATCH RIGHT PICKUP BOX AUXILIARY ENDGATE LATCH RELAY VIO WIRE WHT/BRN WIRE WHT/GRY WIRE YEL WIRE YEL/BLU WIRE

AMBIENT LIGHT SENS SIG BATT POS VOLT BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DIMMER SWITCH FLASH TO PASS FOG LAMP RELAY CONTROL GRN/BRN 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 HIGH BEAM ASSIST HIGH BEAM AUTO ON/OFF SWITCH SIGNAL HIGH SPD GMLAN SER DATA (-) 1 HOT AT ALL TIMES LEFT FRONT FOG LAMP LF DRL CTRL LF HDLP LOW BEAM CTRL LH HDLP RLY CTRL LIGHTING CTRL SW REF LIGHTING CTRL SW SIG RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RF DRL CTRL RH HDLP LOW BEAM CTRL RIGHT FRONT FOG LAMP RIGHT INSTRUMENT PANEL FUSE BLOCK TURN SIGNAL/ MULTI-FUNCTION SWITCH W/ INTEGRATED TRAILER BRAKE CONTROL WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE

AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR AUTO BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BODY CONTROL MODULE (LEFT END OF DASH) BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DIMMER DIMMER SWITCH DRIVER INFORMATION CENTER DISPLAY FLASH TO PASS FOG LAMP RELAY CONTROL FRONT FOG FRONT FOG LAMP IND GRN WIRE GRN/BRN WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE HDLP DIMMER SW HI BEAM SIG HDLP HI BEAM RLY CTRL HDLP OFF SIG CTRL HDLP SW FLASH TO PASS SIG HDLP SW ON SIG HEAD HEADLAMP SWITCH HIGH BEAM ASSIST HIGH BEAM AUTO ON/OFF SWITCH SIGNAL HIGH BEAM IND HIGH SPD GMLAN SER DATA (-) 1 HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE INSTRUMENT CLUSTER LAMP LEFT FRONT FOG LAMP LF DRL CTRL LF HDLP LOW BEAM CTRL LH HDLP RLY CTRL LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 9 LOGIC LOW SPD GMLAN SER DATA IGNITION 1 VOLTAGE RUN/CRANK LOW SPEED GMLAN SERIAL DATA OFF PARK PARK BRAKE CONTROL SWITCH PARK BRAKE SWITCH RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RF DRL CTRL RH HDLP LOW BEAM CTRL RIGHT FRONT FOG LAMP RIGHT INSTRUMENT PANEL FUSE BLOCK SIG GND SOLAR SENSOR LOW REFERENCE SWITCH TURN SIGNAL/ MULTI-FUNCTION SWITCH VIO/BLK WIRE W/ INTEGRATED TRAILER BRAKE CONTROL WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE

2.7L TURBO AMBIENT LIGHT/ SUNLOAD SENSOR AMT LT SEN SIG BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (LEFT END OF DASH) BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DIMMER SWITCH FLASH TO PASS FOG LAMP RLY CTRL FRONT FOG LAMP RELAY GRN WIRE GRN/BRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM HDLP DIMMER SW HI BEAM SIG HDLP HI BEAM RLY HDLP SW FLASH TO PASS SIG HDLP SW HDLP OFF SIG CTRL HEADLAMP HIGH BEAM RELAY HEADLAMP SWITCH ON SIGNAL HIGH BEAM ASSIST HIGH BEAM AUTO ON/OFF SWITCH SIGNAL HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HVAC CONTROL MODULE LEFT HEADLAMP ASSEMBLY LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LH HDLP LOW BEAM CTRL LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 9 LOW SPEED GMLAN SERIAL DATA RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RH HDLP LOW BEAM CTRL RIGHT HEADLAMP ASSEMBLY RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP SOLAR SENSOR LOW REFERENCE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE

AUTO BLK WIRE BLK/WHT WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DIMMER SWITCH DRIVER INFORMATION CENTER DISPLAY FRONT FOG LAMP IND FRONT FOG LAMP SWITCH GRN/BRN WIRE GRY/GRN WIRE HEAD HEADLAMP SWITCH HIGH BEAM IND HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT FRONT FOG LAMP LOGIC LOW SPD GMLAN SER DATA OFF PARK RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RIGHT FRONT FOG LAMP RIGHT INSTRUMENT PANEL FUSE BLOCK SIG GND RUN/CRANK IGNITION 1 VOLTAGE VIO/BLK WIRE WHT WIRE WHT/BRN WIRE WHT/VIO WIRE YEL WIRE

BLK WIRE BLU/GRY WIRE BLU/VIO WIRE COMPUTER DATA LINES SYSTEM DOOR LOCKS SYSTEM DOWN DRIVER WINDOW/OUTSIDE REAR VIEW MIRROR SWITCH EXPRESS GRN WIRE GRN/BLK WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES ILL LEFT FRONT LEFT REAR LEFT REAR WINDOW MOTOR LEFT REAR WINDOW SWITCH LOCKOUT IND LOGIC PASSENGER WINDOW MOTOR PASSENGER WINDOW SWITCH (W/O EXPRESS UP/DOWN) RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE RIGHT FRONT RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT REAR RIGHT REAR WINDOW MOTOR RIGHT REAR WINDOW SWITCH W/ EXPRESS UP/DOWN W/ MEMORY W/O EXPRESS UP/DOWN W/O MEMORY WINDOW LOCK SWITCH WINDOW SWITCH YEL/BLU WIRE

ALL WIND OPEN SW SIG ABS/TRACTION CTRL HILL DESCENT CTRL SW SIG BLK WIRE BLU/YEL WIRE BODY CONTROL MODULE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOOR LOCKS SYSTEM DOWN DRIVER WINDOW MOTOR EXPRESS GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE LEFT INSTRUMENT PANEL CENTER ACCESSORY FUNCTION SWITCH LIN BUS 3 LOGIC OPTION 1 OPTION 1 OPTION 2 OPTION 2 OPTION 1 OPTION 2+ PASSENGER WINDOW MOTOR PASSENGER WINDOW SWITCH (W/ EXPRESS UP/DOWN) RED/BLU WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL CENTER ACCESSORY FUNCTION SWITCH VIO/GRY WIRE W/ EXPRESS UP/DOWN W/ MEMORY W/O MEMORY OPTION 1 OPTION 2 YEL WIRE YEL/BLK WIRE

AUDIO SIG (-) CTRL BATT POSITIVE VOLT BK USB AM/FM ANT SIG BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BRN/BLK WIRE BRN/BLU WIRE COAX COMPUTER DATA LINES SYSTEM CU COAX XM ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE GRY/YEL WIRE GY LVDS DISPLAY SIG HOT AT ALL TIMES LEFT FRONT DOOR SPEAKER LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LF SPEAKER (-) CTRL 1 LF SPEAKER 1 (+) CTRL LOW SPEED GMLAN SERIAL DATA 2 LR (-) CTRL AUDIO SIG LR SPEAKER (+) CTRL LVDS MICROPHONE MICROPHONE SIG RADIO RED/BLU WIRE RED/YEL WIRE RF SPEAKER (-) CTRL 1 RF SPEAKER 1 (+) CTRL RF SPEAKER CTRL (+) RIGHT FRONT DOOR SPEAKER RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPEAKER (+) CTRL SERIAL DATA (-) 9 SERIAL DATA (-) 9 BACKUP LAMP CTRL SERIAL DATA COMMUNICATION ENABLE USB VIO/YEL WIRE W/ DIGITAL AUDIO SYSTEM WHT WIRE WHT/BLU WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE