The 2007 GMC Yukon is equipped with the following wiring harnesses for towing a trailer. The seven-pin connector trailer wiring harness, 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-duty trailer connector available through your dealer.
The seven-wire harness contains the following trailer circuits:
- Yellow: Left Stop/Turn Signal
- Dark Green: Right Stop/Turn Signal
- Brown: Taillamps
- White: Ground
- Light Green: Back-up Lamps
- Red: Battery Feed
- Dark Blue: Trailer Brake
The following diagram is just an illustration of the 2007 GMC Yukon 7 pin Trailer Wiring Harness.