IdentificationAccessory and warranty replacement must use TPC spectires.An outboard orientation stripe is added to the tread surface,with an offset toward the outboard tire face.All GM approved tires (Production, Service and Accessory)have a TPC (Tire Performance Criteria) code.A replacement tire that lacks the original TPC code will notmeet the performance characteristics of the original tire, even ifit is the same brand, model and size.Force and MomentResidual Aligning Torque (RAT)Rolling ResistanceBraking TractionDriving TractionUniformityNoiseDimensionsMassRev/KMHigh SpeedAir RetentionElectrical ResistanceAutomatic MountingEndurance (ATE)TreadwearChip/tearGroove WanderRide and HandlingWet/Snow Handling
The TPC system facilitates tire replacement for GM customerson GM vehicle, meeting the same critical performance specificationsof GM vehicle original equipment tires.
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Your vehicle is an important
investment. This section describes
the required maintenance for the
vehicle. Follow this schedule to help
protect against major repair
expenses resulting from neglect or
inadequate maintenance. It may
also help to maintain the value of
the vehicle if it is sold. ...