User Guide
Tempera
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,
In
most cases,
you
will
not
need to have your wheels
aligned again. However, if
you
notice unusual tire wear
or
your
vehicle pulling one way or
the
other, the
alignment 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.