GMC Terrain II facelift (2021-2024) Trailer tow circuit

BACKUP RLY CTRL BATT POS VOLT BLK WIRE BLU WIRE BLU/BRN WIRE BLU/WHT WIRE BODY CONTROL MODULE COMPUTER DATA LINES SYSTEM EXTERIOR LAMPS CIRCUIT GRN/GRY WIRE GRN/VIO WIRE GRY/BRN WIRE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (-) 1 HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT "C" PILLAR) LEFT TRAILER STOP/TURN SIGNAL LAMP RELAY LH RR TURN SIG LP CTRL RH RR TURN SIG LP CTRL RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RIGHT TRAILER STOP/ TURN SIGNAL LAMP RELAY TRAILER BACKUP LAMPS RELAY TRAILER BRK APPLY SIG TRAILER CONNECTOR (W/ TRAILER BRAKE PROVISIONS) (UNDER CENTER REAR OF VEHICLE) TRAILER CONNECTOR (W/O TRAILER BRAKE PROVISIONS) (UNDER CENTER REAR OF VEHICLE) UNDERHOOD FUSE BLOCK W/ TRAILER BRAKE PROVISIONS W/O TRAILER BRAKE PROVISIONS WHT WIRE WHT/BLU WIRE WHT/GRN WIRE YEL/GRY WIRE