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.
Those grades are molded on the sidewalls of passenger car tires.
While the tires available as standard or optional equipment on General Motors
vehicles may vary with respect to these grades, all such tires meet General
Motors performance standards and have been approved for use on General
Motors vehicles.
All
passenger type
(P
Metric) tires must conform to Federal
safety requirements in addition to these grades.
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.
If
wheel nuts keep
coming loose, the wheel, wheel bolts, and wheel nuts should be replaced.
If
the wheel leaks air out, replace it (except some aluminum wheels, which can
be repaired). See your GM truck dealer
if
any
of
these conditions exist. Your
dealer will know what kind of wheel you need.
Each new wheel should have the same load carrying capacity, diameter,
width, offset, and be mounted the same way as the one it replaces.
If
you need to replace any
of
your wheels, wheel bolts, or wheel nuts,
replace them only with
new
GM original equipment parts. This way, you will
be sure you have the right wheel, wheel bolts, and wheel nuts
for
your
vehicle.
6-55
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