2009 Chevrolet Express Van Owner's Manual - Page 311

Tire Inspection and Rotation Inspect tires regularly for signs of wear or damage. Also inspect the spare tire. For more information on tire inspection, see When It Is Time for New Tires on page 5-73. Tires should be rotated every 5,000 to 8,000 miles (8 000 to 13 000 km). See Scheduled Maintenance on page 6-4. The purpose of a regular tire rotation is to achieve a uniform wear for all tires on the vehicle. This will ensure that the vehicle continues to perform most like it did when the tires were new. Any time you notice unusual wear, rotate the tires as soon as possible and check wheel alignment. Also check for damaged tires or wheels. See When It Is Time for New Tires on page 5-73 and Wheel Replacement on page 5-78. Single Rear Wheels If your vehicle has single rear wheels, always use the correct rotation pattern shown here when rotating the vehicle's tires. Do not include the spare tire in the tire rotation. 5-71