2009 Cadillac Escalade Owner's Manual - Page 432

Maintenance When Trailer Towing The vehicle needs service more often when pulling a trailer. See this manual's Maintenance Schedule or Index for more information. Things that are especially important in trailer operation are automatic transmission fluid, engine oil, axle lubricant, belts, cooling system and brake system. It is a good idea to inspect these before and during the trip. Check periodically to see that all hitch nuts and bolts are tight. The seven-wire harness contains the following trailer circuits: Trailer Wiring Harness Heavy-Duty Trailer Wiring Package Yellow: Left Stop/Turn Signal Dark Green: Right Stop/Turn Signal Brown: Taillamps White: Ground Light Green: Back-up Lamps Red w/ Black Stripe: Battery Feed* Dark Blue: Trailer Brake* *The fuses for these two circuits are installed in the underhood electrical center, but the circuits are not connected. They should be installed by your dealer or a qualified service center. If charging a remote (non-vehicle) battery, press the Tow/Haul mode button, if equipped, located at the end of the shift lever. This will boost the vehicle system voltage and properly charge the battery. If the trailer is too light for Tow/Haul mode, or the vehicle is not equipped with Tow/Haul, turn on the headlamps as a second way to boost the vehicle system and charge the battery. The vehicle is equipped with the seven-wire trailer towing harness. This harness with a seven-pin universal heavy-duty trailer connector is attached to the rear bumper beam. It is located next to the integrated trailer hitch. 5-56