GM Service Manual Online
For 1990-2009 cars only

Important:  The use of wheels or tires with higher load capacity ratings than originally equipped on the vehicle will not increase the gross axle weight rating (GAWR) or the gross vehicle weight rating (GVWR) of the vehicle.

The factory installed tires and wheels are designed to handle loads up to and including the rated load capacity, shown on the vehicle certification label, when the tires are inflated to the recommended inflation pressures.

Correct tire pressures and driving techniques affect tire life. Underinflated tires can cause the following conditions:

    • Handling problems
    • Poor fuel economy
    • Shortened tire life
    • Tire overloading

The following actions can also increase tire wear:

    • Heavy cornering
    • Excessively rapid acceleration
    • Unnecessary braking