2007 Cadillac XLR-V Owner's Manual - Page 427

{CAUTION: Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after a time. The wheel could come off and cause a crash. When you change a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, you can use a cloth or a paper towel to do this; but be sure to use a scraper or wire brush later, if you need to, to get all the rust or dirt off. When rotating P235/50R18 size tires, always use the correct rotation pattern shown here. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire and Loading Information label, see Inflation - Tire Pressure on page 422 and Loading Your Vehicle on page 354. Vehicles that have the Tire Pressure Monitor (TPM) system will need to have the sensors reset after a tire rotation is performed. A special tool is needed to reset the sensor identification codes. See your dealer for service. Make certain that all wheel nuts are properly tightened. See Wheel Replacement on page 432 and "Wheel Nut Torque" under Capacities and Specifications on page 458. XLR-V Tires Tire rotation is not recommended if your vehicle has P235/45R19 size tires on the front axle and P255/40R19 size tires on the rear axle. Different tire sizes front to rear should not be rotated. 427