2011 Buick LaCrosse Owner's Manual - Page 404

10-92 Vehicle Care Dolly Towing from the Rear Dolly Towing from the Front (All-Wheel Drive) Appearance Care Exterior Care Cleaning Exterior Lamps/Lenses Use only lukewarm or cold water, a soft cloth, and a car washing soap to clean exterior lamps and lenses. Follow instructions under "Washing the Vehicle" later in this section. Finish Care Vehicles with all-wheel drive cannot be dolly towed. The vehicle cannot be dolly towed from the rear. Occasional waxing or mild polishing of the vehicle by hand may be necessary to remove residue from the paint finish. Approved cleaning products can be obtained from your dealer.