Buying New Tires
GM has developed and matched specific tires for
your vehicle. The original equipment tires installed
on your vehicle, when it was new, were designed to
meet General Motors Tire Performance Criteria
Specification (TPC Spec) system rating. If you need
replacement tires, GM strongly recommends that you
get tires with the same TPC Spec rating. This way,
your vehicle will continue to have tires that are designed
to give the same performance and vehicle safety,
during normal use, as the original tires.
GM’s exclusive TPC Spec system considers over a
dozen critical specifications that impact the overall
performance of your vehicle, including brake system
performance, ride and handling, traction control, and
tire pressure monitoring performance. GM’s TPC Spec
number is molded onto the tire’s sidewall by the tire
manufacturer. If the tires have an all-season tread
design, the TPC Spec number will be followed by a
MS for mud and snow. See Tire Sidewall Labeling
on page 5-58 for additional information.
The 18-inch performance tires, size 245/45R18 96V,
used on some vehicles, meet the General Motors Tire
Performance Criteria Specification (TPC Spec) rating
but the TPC Spec code has not been molded onto
the tire’s sidewall. If your vehicle has these tires, and
you need to replace them, you can still get these
TPC Spec rated tires by asking your GM dealer.
Your GM dealer can order these tires by part number.
This way, your vehicle will continue to give the
proper endurance, handling, traction, and ride as the
original tires.
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