Buying New TiresGM has developed and matched specific tires foryour vehicle. The original equipment tires installedon your vehicle, when it was new, were designed tomeet General Motors Tire Performance CriteriaSpecification (TPC spec) system rating. If you needreplacement tires, GM strongly recommends that you gettires with the same TPC Spec rating. This way, yourvehicle will continue to have tires that are designed togive the same performance and vehicle safety,during normal use, as the original tires.GM’s exclusive TPC Spec system considers over adozen critical specifications that impact the overallperformance of your vehicle, including brake systemperformance, ride and handling, traction control and tirepressure monitoring performance. GM’s TPC Specnumber is molded onto the tire’s sidewall by thetire manufacturer. If the tires have an all-season treaddesign, the TPC spec number will be followed by anMS for mud and snow. See Tire Sidewall Labelingon page 5-60 for additional information.Winter tires with the same speed rating as your vehicle’soriginal equipment tires may not be available for H, V,W, and ZR speed rated tires. If you choose snowtires with a lower speed rating, never exceed the tire’smaximum speed capability.{CAUTION:Mixing tires could cause you to lose control ofyour vehicle while driving. If you mix tires ofdifferent sizes, brands, or types (radial andbias-belted tires) the vehicle may not handleproperly, and you could have a crash. Usingtires of different sizes, brands or types mayalso cause damage to your vehicle. Be sure touse the correct size, brand and type of tires onall wheels.Your vehicle may have a compact spare tireand wheel assembly. If equipped, it is all rightto drive with your vehicle’s compact spare tiretemporarily, it was developed for use on yourvehicle. See Compact Spare Tire (CTS Only) onpage 5-93.5-74
