Buying New Tires - GMC 2010 T-Series Owner's Manual

The tire has a puncture, cut, or other damage that
cannot be repaired well because of the size or
location of the damage.
The rubber in tires degrades over time, even if they are
not being used. This is also true for the spare tire,
if your vehicle has one. Multiple conditions affect how
fast this aging takes place, including temperatures,
loading conditions, and inflation pressure maintenance.
With proper care and maintenance tires will typically
wear out before they degrade due to age. If you are
unsure about the need to replace your tires as they get
older, consult the tire manufacturer for more information.

Buying New Tires

GM has developed and matched specific tires for your
vehicle. If you need replacement tires, GM strongly
recommends that you get tires that are the same size,
brand, load range, speed rating, and construction type
(radial and bias-belted tires) as your vehicle's original
tires. 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 recommends replacing tires in sets of six or eight
as applicable. This is because uniform tread depth on
all tires will help keep your vehicle performing most like
it did when the tires were new. Replacing less than a
full set of tires can affect the braking and handling
performance of your vehicle.
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WARNING:
Mixing tires on the same axle could cause you to
lose control while driving. If you mix tires of
different sizes, tread patterns, or type (radial and
bias-belted tires) on the same axle, the vehicle
may not handle properly, and you could have a
crash. Always use tires of the same size, load
range, and type (radial and bias-belted tires) as
the vehicle s original tires.
Using tires that are a different size or type than
originally supplied on the vehicle may cause damage to
the vehicle.
WARNING:
If you use bias-ply tires on the vehicle, the
wheel rim flanges could develop cracks after
many miles of driving. A tire and/or wheel
could fail suddenly, causing a crash. Use
only radial-ply tires with the wheels on the
vehicle.