2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 531

CAUTION: (Continued) . 20‐Inch Tires If your vehicle has the optional 20‐inch P275/55R20 size tires, they are classified as touring tires and are designed for on road use. The low‐profile, wide tread design is not recommended for "off‐road" driving or commercial uses such as snow plowing. See Off-Road Driving on page 5‑13 and Adding a Snow Plow or Similar Equipment on page 5‑41 for additional information. Notice: If the vehicle has low‐profile tires, they Underinflated tires pose the same danger as overloaded tires. The resulting accident could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when your vehicle's tires are cold. See Inflation - Tire Pressure on page 6‑80. Overinflated tires are more likely to be cut, punctured, or broken by a sudden impact - such as when you hit a pothole. Keep tires at the recommended pressure. Worn, old tires can cause accidents. If the tire's tread is badly worn, or if your vehicle's tires have been damaged, replace them. . . are more susceptible to damage from road hazards or curb impact than standard profile tires. Tire and/or wheel assembly damage can occur when coming into contact with road hazards like, potholes, or sharp edged objects, or when sliding into a curb. The vehicle warranty does not cover this type of damage. Keep tires set to the correct inflation pressure and, when possible avoid contact with curbs, potholes, and other road hazards. 6-71