Chevrolet EXPRESS - 2011 Manual page 340

GM has developed and matched
specific tires for the vehicle. The
original equipment tires installed on
the 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, the 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 the
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 near the tire size.
If the tires have an all season tread
design, the TPC spec number will
be followed by an MS for mud and
snow. See
for additional
information.
GM recommends replacing tires in
sets of four. This is because uniform
tread depth on all tires will help
keep the 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 the vehicle.
See
and
information on proper tire rotation.
Tires could explode during
improper service. You or others
could be injured or killed if you
attempt to mount or dismount
a tire.
Only your dealer or an authorized
tire service center should mount
and dismount the tires.
Mixing tires could cause you
to lose control while driving.
If you mix tires of different sizes,
brands, or types (radial and
bias-belted tires), the vehicle
for
might not handle properly, and
you could have a crash. Using
tires of different sizes, brands,
or types could also cause
damage to the vehicle. Be sure to
use the same size, brand, and
type of tires on all wheels.
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