Trailer Wiring Harness - GMC 2001 Yukon XL Owner's Manual

Trailer Wiring Harness

Your vehicle is equipped with the following wiring
harnesses for towing a trailer.
Basic Trailer Wiring Package
The trailer wiring harness, with a seven
is located at the rear of the vehicle and is tied to the
vehicle's frame. The harness connector can be plugged
-
into a seven pin universal heavy
available through your dealer.
4-62
-
pin connector,
-
duty trailer connector
-
The seven wire harness contains the following
trailer circuits:
D
Yellow: Left Stop/Turn Signal
D
Dark Green: Right Stop/Turn Signal
D
Brown: Taillamps
D
White: Ground
D
-
Light Green: Back up Lamps
D
Red: Battery Feed
D
Dark Blue: Trailer Brake
If you need to upgrade your vehicle to heavy
trailering, a brake controller harness is available from
your dealer.
-
duty