GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Firebird 🢒 Suspension 🢒 Tires and Wheels 🢒 Wheels Description

Replace wheels under the following conditions:

    • The wheels are bent
    • The wheels have dents
    • The wheels have excessive lateral or radial runout
    • The wheels leak air through the wheel welds
    • The wheels have elongated bolt holes
    • The wheel nuts will not stay tight

Wheels with runout that is greater than specified may cause objectionable vibrations.

Replacement wheels must be equivalent to the original equipment wheels in the following ways:

    • Load capacity
    • Diameter
    • Rim width
    • Offset configuration
    • Mounting configuration

A wheel of the incorrect size or type may affect the following:

    • The wheel life
    • The bearing life
    • The break cooling
    • The speedometer/odometer calibration
    • The antilock brake system
    • The vehicle ground clearance
    • The tire clearance to the body and the chassis

A two or three-letter code identifies steel wheels. The two or three-letter code is stamped into the front side of the rim near the valve stem. Aluminum wheels have the code, the part number and the manufacturer ID cast into the inboard side.