2008 Pontiac Grand Prix Owner's Manual - Page 346

The purpose of a regular tire rotation is to achieve a uniform wear for all tires on the vehicle. This will ensure that your vehicle continues to perform most like it did when the tires were new. Any time you notice unusual wear, rotate your vehicle's tires as soon as possible and check the wheel alignment. Also check for damaged tires or wheels. See When It Is Time for New Tires on page 5-77 and Wheel Replacement on page 5-82 for more information. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire and Loading Information label, and reset the Tire Pressure Monitor System. See Tire Pressure Monitor System on page 5-71 for additional information. Make certain that all wheel nuts are properly tightened. See "Wheel Nut Torque" under Capacities and Specifications on page 5-128. {CAUTION: Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. 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 needed, to get all the rust or dirt off. See Changing a Flat Tire on page 5-96. Rotation Pattern for Non-GXP Tires Only The correct rotation pattern shown here is only for non-GXP tires. Do not include a compact spare tire, if your vehicle has one, in the vehicle's tire rotation. 5-76