GMC Sierra IV (2018-2022) base body/chassis Wiring diagrams

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

BACKUP LAMPS CIRCUIT BASE BODY/CHASSIS BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE CUSTOM, TRAIL BOSS LT, LTZ, RST, TRAIL BOSS CUSTOM PACKAGE GRN WIRE GRN/VIO WIRE GRY/BLU WIRE GRY/BRN WIRE 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 RIGHT CARGO LAMP VIO/GRY WIRE VIO/WHT WIRE WHT/VIO WIRE WORK TRUCK, LT PACKAGE YEL/BLU WIRE

2.7L TURBO BACKUP LAMPS CIRCUIT BASE BODY/CHASSIS BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE CUSTOM, TRAIL BOSS LT, LTZ, RST, TRAIL BOSS CUSTOM PACKAGE GRN WIRE GRN/VIO WIRE GRY/BRN WIRE HOT AT ALL TIMES NCA WIRE RED/GRN WIRE RIGHT BACKUP LAMP RIGHT LOWER TAIL/STOP, TURN SIGNAL LAMP RIGHT REAR SIDE MARKER LAMP RIGHT TAIL LAMP ASSEMBLY RIGHT TAIL/STOP, TURN SIGNAL LAMP RIGHT UPPER TAIL/STOP, TURN SIGNAL LAMP VIO/GRY WIRE VIO/WHT WIRE WHT/VIO WIRE WORK TRUCK, LT PACKAGE