GM Service Manual Online
For 1990-2009 cars only

Problem

Possible Cause

Correction

Broken Wheel Studs

Loose wheel nuts

Replace the studs and follow the recommended torque procedure.

Overloading

Replace the stud.

Stripped Threads

Excessive clamp load

Replace the studs and follow the recommended torque procedure.

Rusted Streaks from Stud Holes

Loose wheel nuts

Inspect the complete assembly. Replace the studs and follow the recommended torque procedure.

Damaged Wheel Nuts

Loose wheel assembly

Replace the wheel nuts and follow the recommended torque procedure.

Frozen Wheel Nuts

Corrosion or galling

Replace the wheel nuts. Replace the wheel studs.

Cracked or Broken Wheel Discs, Cracks Developed in the Wheel Disc around Hand Holes, Rims, or Studs

Metal fatigue resulting from overheating

Replace the wheel. Inspect the position of the wheel on the vehicle for proper working load specifications.

Damaged Stud Holes, Stud Holes become Worn, Elongated or Deformed, Metal Builds Up around Stud Hole Edges, Cracks Develop from Stud Hole to Stud Hole

Loose wheel mounting

Replace the wheel and perform the following inspections:

    • Inspect the installation for correct wheel studs and wheel nuts.
    • Replace cracked or broken wheel studs.
    • Replace a hub with worn, damaged or cracked wheel pilot pads.
    • Clean the mounting surfaces and retorque the wheel nuts periodically.
    • Rust streaks fanning out from the stud holes indicate that the wheel nuts are loose or were loose.