Back-up lamps circuit, without allison automatic transmission for GMC Cab & Chassis Sierra 3500 (2004-2007)

B/U LMP VLT B/U LMPS SIG B/U LP FUSE BLK WIRE BLUNT CUT (W/ CAMPER BODY CONTROL MODULE (BCM) (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) DIESEL ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENG COMPT) GRN WIRE GRY WIRE GRY/BLK WIRE HARNESS) HOT IN RUN OR START LEFT BACK-UP LAMP RIGHT BACK-UP LAMP LT BACK-UP ALARM LT GRN WIRE PARK/NEUTRAL POSITION (PNP) SWITCH (LEFT SIDE OF TRANSMISSION) PNK A/T WIRE PNK M/T WIRE PNK WIRE REAR LAMPS JUNCTION BLOCK (INSIDE LEFT FRAME RAIL) TRAILER CONNECTOR TRAILER WIRING PROVISIONAL) TRLR B/U FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENG COMPT)