2004 GMC Envoy XUV Owner's Manual - Page 308
2004 GMC Envoy XUV Manual
Page 308 highlights
Trailer Wiring Harness White: Ground Light Green: Back-up Lamps Red: Battery Feed Dark Blue: Electric Brakes If you need to tow a light-duty trailer with a standard four-way round pin connector, an adapter connector is available from your dealer. Your vehicle may also be equipped with wiring for an electric trailer brake controller. These wires are located inside the vehicle on the driver's side under the instrument panel. These wires should be connected to an electric trailer brake controller by your dealer or a qualified service center. Your vehicle may be equipped with the seven-wire trailer towing harness. This harness has a seven-pin universal heavy-duty trailer connector that is attached to a bracket on the hitch platform. The seven-wire harness contains the following trailer circuits: • Yellow: Left Stop/Turn Signal • Dark Green: Right Stop/Turn Signal • Brown: Running Lamps 4-66