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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 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 tires and wheels were aligned and balanced at the factory to provide the longest tire life and best overall

performance. Adjustments to wheel alignment and tire balancing are not


necessary on a regular basis. Consider an alignment check if there is unusual tire wear or the vehicle is significantly pulling to one side or the other. Some slight pull to the left or right,

depending on the crown of the road and/or other road surface variations such as troughs or ruts, is normal.

If the vehicle is vibrating when driving on a smooth road, the tires and

wheels may need to be rebalanced.

See your dealer for proper diagnosis.

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. Some aluminum wheels can be repaired. See your dealer if any of these conditions exist.

Your dealer will know the kind of wheel that is needed.

Each new wheel should have the same load-carrying capacity, diameter,

width, offset, and be mounted the same way as the one it replaces.


Replace wheels, wheel bolts, wheel

nuts, or Tire Pressure Monitor System (TPMS) sensors with new GM original equipment parts.


{ Warning

Using the wrong replacement

wheels, wheel bolts, or wheel nuts can be dangerous. It could affect

the braking and handling of the vehicle. Tires can lose air, and

cause loss of control, causing a

crash. Always use the correct wheel, wheel bolts, and wheel nuts for




The wrong wheel can also cause problems with bearing life, brake

cooling, speedometer or odometer calibration, headlamp aim, bumper height, vehicle ground clearance,

and tire or tire chain clearance to the body and chassis.