2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 338

10-68 Vehicle Care The outer tire on a dual wheel setup generally wears faster than the inner tire. Tires last longer and wear more evenly if they are rotated. See Tire Inspection on page 10‑66 and Tire Rotation on page 10‑66. Also see Scheduled Maintenance on page 11‑3. Dual Tire Rotation When the vehicle is new, or whenever a wheel, wheel bolt, or wheel nut is replaced, check the wheel nut torque after 160, 1 600, and 10 000 km (100, 1,000, and 6,000 m) of driving. For proper wheel nut tightening information, see "Removing the Flat Tire and Installing the Spare Tire" later in this section, under If a Tire Goes Flat on page 10‑76. Also see "Wheel Nut Torque" under Capacities and Specifications on page 12‑2. When It Is Time for New Tires Factors such as maintenance, temperatures, driving speeds, vehicle loading, and road conditions affect the wear rate of the tires. { WARNING If the vehicle is operated with a tire that is underinflated, the tire can overheat. An overheated tire can lose air suddenly or catch fire. You or others could be injured. Properly inflate all tires, including the spare. See Tires on page 10‑52 and Tire Pressure on page 10‑60 for more information on proper tire inflation. Treadwear indicators are one way to tell when it is time for new tires. Treadwear indicators appear when the tires have only 1.6 mm (1/16 in) or less of tread remaining.