Chevrolet 2011 Impala Owner's Manual page 315

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 Tire
Sidewall Labeling on page 10 43
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 Tire Inspection on
page 10 56 and Tire Rotation on
page 10 56 for information on
proper tire rotation.
WARNING
Tires could explode during
improper service. Attempting to
mount or dismount a tire could
cause injury or death. Only your
dealer or authorized tire service
center should mount or dismount
the tires.
Vehicle Care
WARNING
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 may not handle
properly, and you could have
a crash. Using tires of different
sizes, brands, or types may
also cause damage to the
vehicle. Be sure to use the
correct size, brand, and type
of tires on all wheels. It is
all right to drive with the
compact spare temporarily,
as it was developed for use
on the vehicle. See Compact
Spare Tire on page 10 74.
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