GMC Cab & Chassis Sierra 3500 (2004-2007) trailer wiring provisional) Wiring diagrams

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) GRN WIRE GRY WIRE HOT IN RUN OR START LEFT 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 RIGHT BACK-UP LAMP TRAILER CONNECTOR TRAILER WIRING PROVISIONAL) TRLR B/U FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENG COMPT)

ALLISON TRANSMISSION B/U LMP VLT BATTERY BLK WIRE BLUNT CUT (W/ CAMPER BODY CONTROL MODULE (BCM) (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) COMPUTER DATA LINES SYSTEM DIESEL ENGINE CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) FUSE GRN WIRE GRY WIRE GRY/BLK WIRE HARNESS) HOT AT ALL TIMES I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) I/P RELAY BLOCK (NEAR LEFT KICK PANEL) LEFT BACK-UP LAMP LT BACK-UP ALARM LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PRESS SW PRESSURE SWITCH MANIFOLD REAR LAMPS JUNCTION BLOCK (INSIDE LEFT FRAME RAIL) REV SIG RIGHT BACK-UP LAMP SERIAL DATA TRAILER CONNECTOR TRAILER WIRING PROVISIONAL) TRANSMISSION CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) TRLR B/U FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENG COMPT) YEL WIRE

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)

1 2 6 9 GROUND LT TURN SIG VOLT LT DOOR LMP PWR LT DOOR LMP GND 22 11 SERIAL DATA LT TURN SIG VOLT 22 26 SERIAL DATA RT TURN SIG 5 9 RT DOOR LMP PWR RT DOOR LMP GND BATTERY BLK WIRE BLK/WHT WIRE BLU WIRE BLUNT CUT (W/ CAMPER BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CLEARANCE LAMPS COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DK BLU WIRE DK GRN WIRE DRIVER DOOR MODULE (DDM) (IN DRIVER'S DOOR) DRIVER OUTSIDE REARVIEW MIRROR ENGINE CONTROLS SYSTEM EXT- ERIOR ILLUM LAMP FLASH FUSE FRONT PASSENGER DOOR MODULE (FPDM) (IN RIGHT FRONT DOOR) GROUND GRY/BLK WIRE HAZARD SW HD TRAILERING EQUIPMENT PROVISIONAL (BLUNT CUT) HOT AT ALL TIMES I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) I/P JUNCTION BLOCK (RIGHT SIDE OF DASH) I/P RELAY BLOCK I/P RELAY BLOCK (NEAR LEFT KICK PANEL) INSTRUMENT PANEL CLUSTER (IPC) LEFT ROOF MARKER LAMP LEFT TURN IND LOGIC LR LAMP VOLT LT BLU WIRE LT GRN WIRE LT TRLR ST/TURN FUSE LT TURN FUSE LT TURN SIG ORG/BLK WIRE PASSENGER OUTSIDE REARVIEW MIRROR RED WIRE RIGHT ROOF MARKER LAMP RIGHT TURN IND RR LAMP VOLT RT TRLR ST/TURN FUSE RT TURN FUSE RT TURN SIG RT TURN SIG VOLT STOPLAMP SW TAN WIRE TRAILER WIRING PROVISIONAL) TURN IND TURN SIGNAL/HAZARD FLASHER MODULE UNDER- HOOD FUSE BLOCK VEH CHMSL FUSE VEH STOP FUSE WHT WIRE YEL WIRE