1997 Chevrolet Astro Owner's Manual - Page 301

Tire Inspection and Rotation Tires should be rotated every 6,000 to 8,000 miles ( 10 000 to 1 3 000 km). Any time you notice unusual wear, rotate your tires as soon as possible and check wheel alignment. Also check for damaged tires or wheels. See "When It's Time for New Tires'' and "Wheel Replacement" later in this section for more information. The purpose of regular rotation is to achievemore uniform wear for all tires on the vehicle. The first rotation is the most important. See "Scheduled Maintenance Services" in the Index for scheduled rotation intervals. When rotating your tires, always use the correct rotation pattern shown here. Don't include thecompact spare tire in your tire rotation. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Certificatioflire label. Make certain that all wheel nuts are properly tightened. See "Wheel Nut Torque" in the Index. Rust or dirt on wheel, o r on the parts to which a wheel nuts become loose it is fastened, can make after a time. The wheel could comeoff and cause an accident. When you change a wheel, remove any rust or dirt from places where wheel the attaches to thevehicle. In an emergency, can you use a clothor a paper towel to do this; but be sure touse a scraper orwire brush later,if you need to, to get all the rust or dirt (See off. "Changing a Flat Tire" in the Index.) ~ 6-45