Backup lamps circuit for GMC Sierra 2500 (2000-2004)

B/U LP FUSE BLK WIRE HOT IN RUN OR START LEFT BACK-UP LAMP LIGHT DUTY TRAILER WIRING (BLUNT CUT) LT GRN WIRE MIRRORS SYSTEM (AUTOMATIC DAY/NIGHT MIRROR) PNK WIRE PNK A/T WIRE PNK M/T WIRE PNK WIRE REAR LAMPS BUSSING BLOCK (FRONT OF REAR BUMBER, ON CROSSMEMBER) RIGHT BACK-UP LAMP TRAILER CONNECTOR (HEAVY DUTY) VEH B/U FUSE