GMC Sierra 2500 HD (2002-2012) Back-up lamps circuit

BACK-UP ALARM BCK/UP BCK/UP LAMP PCB RELAY BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) DK BLU WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR LEFT BACKUP LAMP LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LT GRN WIRE NCA WIRE REAR LAMPS JUNCTION BOX (INSIDE OF LEFT REAR FRAME RAIL) RIGHT BACKUP LAMP TRLR BCK/UP FUSE 11 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEH BCK/UP FUSE 16 WHT WIRE