Buying New Tires - Pontiac 2006 Grand Prix Owner's Manual

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 an MS
for mud and snow. See Tire Sidewall Labeling on
page 5-62 for additional information.
5-72
CAUTION:
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Mixing tires could cause you to lose control
while driving. If you mix tires of different sizes
(other than those originally installed on your
vehicle), brands, or types (radial and
bias-belted tires), the vehicle may not handle
properly, and you could have a crash. Using
tires of different sizes (other than those
originally installed on your vehicle) may also
cause damage to your vehicle. Be sure to use
the correct size, brand, and type tires on all
wheels. If your vehicle has a compact spare
tire, it is all right to drive your vehicle with the
compact spare temporarily. It was developed
for use on your vehicle. See Compact Spare
Tire on page 5-99.