User Guide
Traction
--
A,
B,
C
The traction sades, from highest to lowesr. are
A.
B.
and
C,
and
they
represent the tire's ability to stop on wet
pavement
as
measured under controlled conditions
on
specified government test surfaces
of
asphalt and concrete.
A
tire marked
C
may have poor traction per-fornmance.
Warning: The traction grade assigned to
this
tire is based
on braking (straight ahead) traction tests and does not
include cornering (turning) traction.
Temperature
--
A,
B,
C
The temperature grades are
A
(the
highest).
B,
and
C.
representing the tire's resistance
to
the generation
of
heat and its ability to dissipate heat when tested under
controlled conditions on
a
specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce tire life.
and excessive temperature can lead to sudden tire
failure. The grade
C
corresponds to a level
of
performance which all passenger car tires must meet
under the Federal Motor Vehicle Safety Standard
No.
109.
Grades
B
and
A
represent higher levels
of
performance on the laboratory test wheel than the
minimum required by law.
Warning: The temperature grade for this tire
is
established for
a
tire that is properly inflated and
not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately
or
in
combination.
can cause heat buildup and possible tire failure.
Wheel Alignment and Tire Balance
The wheels on
your
vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are
not
needed. However,
if
you notice unusual tire wear or
your vehicle pulling one way or
the
other. the alipment
may
need to be reset.
If
you notice your vehicle
vibrating when driving
on
a
smooth road, your wheels
may need to be rebalanced.
Wheel Replacement
Replace any wheel that
is
bent. cracked, or badly rusted
or corroded.
If
wheel nuts keep coming loose, the wheel.
wheel bolts and wheel
nuts should be replaced.
If
the
wheel leaks air. replace
it
(except some aluminum
wheels. which can sometimes be repaired).
See
your
GM
dealer
if
any
of
these conditions exist.
Your dealer
will
know the kind of wheel you need.
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