Buying New TiresTo find out what kind and size of tires your vehicleneeds, look at the tire and loading information label.For more information about this label and its location onyour vehicle, seeLoading Your Vehicle on page 4-33.The tires installed on your vehicle when it was newhad a Tire Performance Criteria Specification (TPCSpec) number on each tire’s sidewall. When you getnew tires, GM recommends that you get tires withthat same TPC Spec number. That way your vehiclewill continue to have tires that are designed to giveproper endurance, handling, speed rating, loadrange, traction, ride, tire pressure monitoring systemperformance and other things during normal serviceon your vehicle. If your tires have an all-season treaddesign, the TPC number will be followed by an “MS”(for mud and snow).Whenever you replace your tires with those not havinga TPC Spec number, make sure they are the samesize, load range, speed rating and constructiontype (bias, bias-belted or radial) as your original tires.Winter tires with the same speed rating as your originalequipment tires may not be available for H, V, W,and ZR speed rated tires. If you choose snow tires witha lower speed rating, never exceed the tire’s maximumspeed capability.If you replace your vehicle’s tires with those not havinga TPC Spec number, the tire pressure monitoringsystem may give an inaccurate low pressure warning.Non-TPC Spec tires may give a low pressure warningthat is higher or lower than the proper warning level youwould get with TPC Spec numbered tires.{CAUTION:Mixing tires could cause you to lose controlwhile driving. If you mix tires of different sizesor types (radial and bias-belted tires), thevehicle may not handle properly, and youcould have a crash. Using tires of differentsizes may also cause damage to your vehicle.Be sure to use the same size and type tires onall wheels. It’s all right to drive with yourcompact spare temporarily, it was developedfor use on your vehicle. SeeCompact SpareTire on page 5-87.5-70
