2000 GMC Yukon Owner's Manual - Page 266

2000 GMC Yukon Manual

Page 266 highlights

The seven-wire harness contains the following trailer circuits: Heavy-Duty Trailer Wiring Package (If Equipped) D D D D D D D 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 If you need to upgrade your vehicle to heavy-duty trailering, a brake controller harness is available from your dealer. Your vehicle is equipped with the seven-wire trailer towing harness. This harness with a seven-pin universal heavy-duty trailer connector that is attached to a bracket on the hitch platform (if equipped). 4-63

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