2011 GMC Savana 1500 Cargo Owner's Manual - Page 335

Vehicle Care Non‐TPC Spec-rated tires may give a low‐pressure warning that is higher or lower than the proper warning level you would get with TPC Spec-rated tires. See Tire Pressure Monitor System on page 10‑59. The vehicle's original equipment tires are listed on the Tire and Loading Information label. See Vehicle Load Limits on page 9‑12 for more information about the Tire and Loading Information label and its location on the vehicle. control, and electronic stability control, the performance of these systems can be affected. 10-69 Uniform Tire Quality Grading Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear 200 Traction AA Temperature A The following information relates to the system developed by the United States National Highway Traffic Safety Administration (NHTSA), which grades tires by treadwear, traction, and temperature performance. This applies only to vehicles sold in the United States. The grades are molded on the sidewalls of most passenger car tires. { WARNING If you add different sized wheels, the vehicle may not provide an acceptable level of performance and safety if tires not recommended for those wheels are selected. You may increase the chance that you will crash and suffer serious injury. Only use GM specific wheel and tire systems developed for the vehicle, and have them properly installed by a GM certified technician. See Buying New Tires on page 10‑67 and Accessories and Modifications on page 10‑4 for additional information. Different Size Tires and Wheels If you add wheels or tires that are a different size than the original equipment wheels and tires, this could affect the way the vehicle performs, including its braking, ride and handling characteristics, stability, and resistance to rollover. Additionally, if the vehicle has electronic systems such as antilock brakes, rollover airbags, traction