2005 GMC Savana Van Owner's Manual - Page 298

Dual Tire Operation When the vehicle is new, or whenever a wheel, wheel bolt or wheel nut is replaced, check the wheel nut torque after 100, 1,000 and 6,000 miles (160, 1 600 and 10 000 km) of driving. For proper wheel nut tightening information, see "Removing the Flat Tire and Installing the Spare Tire" later in this section, under Changing a Flat Tire on page 5-68. Also see "Wheel Nut Torque" under Capacities and Specifications on page 5-98. The outer tire on a dual wheel setup generally wears faster than the inner tire. Your tires will wear more evenly and last longer if you rotate the tires periodically. See Tire Inspection and Rotation on page 5-60. Also see Scheduled Maintenance on page 6-4. Tire Inspection and Rotation Tires should be rotated every 5,000 to 8,000 miles (8 000 to 13 000 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 Is Time for New Tires on page 5-62 and Wheel Replacement on page 5-65 for more information. Make sure the spare tire is stored securely. Push, pull, and then try to rotate or turn the tire. If it moves, use the ratchet/wheel wrench to tighten the cable. See Changing a Flat Tire on page 5-68. If your vehicle has dual rear wheels, also see Dual Tire Operation on page 5-60. The purpose of regular rotation is to achieve more uniform wear for all tires on the vehicle. The first rotation is the most important. See Scheduled Maintenance on page 6-4. {CAUTION: If you operate your vehicle with a tire that is badly underinflated, the tire can overheat. An overheated tire can lose air suddenly or catch fire. You or others could be injured. Be sure all tires (including the spare) are properly inflated. See Tires on page 5-52 and Inflation - Tire Pressure on page 5-58 for more information on proper tire inflation. 5-60