Car Wiring Diagrams for Backup lamps circuit for GMC Sierra IV (2018-2022)

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

2.7L TURBO BACKUP LP RLY CTRL BASE BODY/CHASSIS BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/BRN WIRE BODY CONTROL MODULE (LEFT END OF DASH) COMPUTER DATA LINES SYSTEM GRN WIRE GRN/WHT WIRE HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES INSIDE REAR VIEW MIRROR LEFT BACKUP LAMP LEFT TAIL LAMP ASSEMBLY NCA WIRE RADIO RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RIGHT BACKUP LAMP RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT TAIL LAMP ASSEMBLY TRAILER BACKUP LAMPS RELAY UNDERHOOD FUSE BLOCK W/ LOW LEVEL W/ MID/ HIGH LEVEL WHT WIRE WHT/GRN WIRE

10 SPEED A/T 5.3L 2.7L TURBO 8 SPEED A/T AUTOMATIC TRANSMISSION ASSEMBLY (10 SPEED A/T) AUTOMATIC TRANSMISSION ASSEMBLY (6 SPEED A/T) AUTOMATIC TRANSMISSION ASSEMBLY (8 SPEED A/T) BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLU WIRE BLU/WHT WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY ENG CTRL ENG CTRL VEH ENGINE CONTROL MODULE ENGINE CONTROL MODULE (4.3L) GMLAN SERIAL DATA BUS (-) 1 GRN WIRE GRN/YEL WIRE GRY WIRE HI SPD GMLAN SER DATA (+) 1 IGN MODE SW MODE CTRL IGN MODE SW MODE CTRL BACKUP INT MODE SW MODE CTRL Y NCA WIRE ORG/ WIRE RED WIRE TRAILER CONNECTOR TRANSMISSION CONTROL MODULE TRANSMISSION INTERNAL MODE SWITCH TRANSMISSION PARK/NEUTRAL SIG 1 TRANSMISSION RANGE SENSOR VIO/BLU WIRE W/ SPECIAL EQUIPMENT WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/GRY WIRE