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:

  1. Yellow: Left Stop/Turn Signal
  2. Dark Green: Right Stop/Turn Signal
  3. Brown: Taillamps
  4. White: Ground
  5. Light Green: Back-up Lamps
  6. Red: Battery Feed
  7. Dark Blue: Trailer Brake

The following diagram is just an illustration of the 2007 GMC Yukon 7 pin Trailer Wiring Harness.

2007 GMC Yukon Seven-Pin Trailer Wiring Harness

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