GMC 2006 Sierra - Manual (Page 406)

Camper/Fifth-Wheel Trailer Wiring Package
The eight-wire camper harness is located under the front
edge of the pickup box on the driver’s side of the vehicle,
attached to the frame bracket. A connector will have to be
added to the wiring harness which connects to the
camper.
The eight-wire harness contains the following
camper/trailer circuits:
• Yellow: Left Stop/Turn Signal
• Dark Green: Right Stop/Turn Signal
• Brown: Taillamps
• White: Ground
• Light Green: Back-up Lamps
• Light Blue: Center High-Mounted
Stoplamp (CHMSL)
• Red: Battery Feed
• Dark Blue: Trailer Brake
If your vehicle is equipped with the “Heavy-Duty
Trailering” option, please refer to “Heavy-Duty Trailer
Wiring Package” earlier in this section.
When the camper-wiring harness is ordered without the
heavy-duty trailering package, an eight-wire harness with
a seven-pin connector and separate CHMSL connector
are located at the rear of the vehicle and are tied to the
vehicle’s frame.
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