294 VEHICLE CAREBuying New TiresGM has developed and matchedspecific tires for the vehicle. Theoriginal equipment tires installedwere designed to meet GeneralMotors Tire Performance CriteriaSpecification (TPC Spec) systemrating. When replacement tires areneeded, GM strongly recommendsbuying tires with the same TPCSpec rating.GM's exclusive TPC Spec systemconsiders over a dozen criticalspecifications that impact theoverall performance of the vehicle,including brake systemperformance, ride and handling,traction control, and tire pressuremonitoring performance. GM'sTPC Spec number is molded ontothe tire's sidewall near the tiresize. If the tires have an all-seasontread design, the TPC Specnumber will be followed by MS formud and snow.GM recommends replacing worntires in complete sets of four.Uniform tread depth on all tireswill help to maintain theperformance of the vehicle.Braking and handling performancemay be adversely affected if all thetires are not replaced at the sametime. If proper rotation andmaintenance have been done, allfour tires should wear out atabout the same time. See TireRotation 0 291 for information onproper tire rotation. However, if itis necessary to replace only oneaxle set of worn tires, place thenew tires on the rear axle.{ WarningTires could explode duringimproper service. Attempting tomount or dismount a tire couldcause injury or death. Only yourdealer or authorized tire servicecenter should mount ordismount the tires.Winter tires with the same speedrating as the original equipmenttires may not be available for H, V,W, Y, and ZR speed rated tires.Never exceed the winter tire'smaximum speed capability whenusing winter tires with a lowerspeed rating.{ WarningNever drive faster than the speedthe tires are rated, regardless of thelegal speed limit. When frequentlydriving the vehicle at high speedsand/or for prolonged periods oftime, check with your vehicle/tiredealer for the proper type of tires touse for the specific driving andweather conditions.
