2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 462

10-56 Vehicle Care when coming into contact with road hazards like, potholes, or sharp edged objects, or when sliding into a curb. The 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. 20‐Inch Tires If the vehicle has 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 9‑7 and Adding a Snow Plow or Similar Equipment on page 9‑117 for additional information. Notice: Low‐profile tires are more susceptible to damage from road hazards or curb impact than standard profile tires. Tire and/or wheel assembly damage can occur Tire Sidewall Labeling Useful information about a tire is molded into the sidewall. The examples show a typical passenger and light truck tire sidewall. Passenger (P‐Metric) Tire (A) Tire Size: The tire size code is a combination of letters and numbers used to define a particular tire's width, height, aspect ratio, construction type, and service description. See the "Tire Size" illustration later in this section for more detail.