2003 Oldsmobile Bravada Owner's Manual - Page 258
2003 Oldsmobile Bravada Manual
Page 258 highlights
Trailer Wiring Harness Yellow: Left Stop/Turn Signal Dark Green: Right Stopnurn Signal @ Brown: Running Lamps 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 is also 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. 4-53