GMC Sierra 2500 HD (2002-2012) Trailer/camper adapter circuit

BLK WIRE BLU WIRE BODY CONTROL MODULE BODY RELAY BLOCK (LEFT SIDE OF DASH) BRN WIRE CAMPER EXTENSION CAMPER IN-LINE CONNECTOR CAMPER WIRING (PICKUP ONLY) CHMSL FUSE DK HOT WITH PARKLAMP RELAY ENERGIZED DK LT DK GRN WIRE HEAVY DUTY TRAILER WIRING HOT IN REVERSE (UTILITIES) HOT AT RUN AND START (PICKUP) HOT WITH BACK-UP LAMP SWITCH CLOSED HOT WITH PARKLAMP RELAY ENERGIZED HOT WITH STOPLAMP HOT AT SWITCH ALL TIMES DEPRESSED HOT WITH STOPLAMP SWITCH DEPRESSED INT PRK FUSE LIGHT DUTY TRAILER WIRING (PICKUP ONLY) LT DK LT DK LT DK LT GRN WIRE LT PICKUP ONLY NCA WIRE RED WIRE SPLICE PACK 203 STUD 1 STUD 1 MAXI FUSE CHMSL FUSE STUD 2 TRAILER IN-LINE CONNECTOR TRAILER WIRING (BLUNT CUT) TRL L TRN FUSE TRL PRK FUSE TRL R TRN FUSE TRL R TRN FUSE TRL PRK FUSE TRLR B/U FUSE TURN/ HAZARD SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENG COMPT, NEAR BATTERY) UTILITIES ONLY VEH B/U FUSE WHT WIRE YEL WIRE