GM Service Manual Online
For 1990-2009 cars only

Many conditions, including the following list, can cause irregular or premature tire wear:

    â€¢ Incorrect inflation pressure
    â€¢ Lack of regular rotation
    â€¢ Driving habits
    â€¢ Improper tire and wheel alignment

If you reset tire and wheel alignment due to a tire wear condition, always rest the toe as close to 0 degrees as the specification allows.

Rotate the tires if you notice any of the following conditions:

    â€¢ Front and rear tire wear is unequal
    â€¢ The tread of any tire wear is uneven
    â€¢ Left and right front tire wear is unequal

Test the tire and wheel alignment if you notice any of the following conditions:

    â€¢ The left and the right front tire wear is unequal
    â€¢ The tread of any front tire wear is uneven
    â€¢ The front tire treads have a scuffed appearance with feather edges on one side of the tread ribs or blocks