GM Service Manual Online
For 1990-2009 cars only

All models use metric wheels nuts and wheel studs. The nut will have the word metric stamped on the face and the stud will have the letter M stamped into the threaded end. The word metric is stamped on the head.

The thread size of the metric wheels nuts and wheel studs are M12x1.5. This signifies:

    • M = Metric
    • 12 = Diameter in millimeters
    • 1.5 = Millimeters per thread

If you find a broken stud, refer to Wheel Stud Replacement in Front Suspension or to Wheel Stud Replacement in Rear Suspension for the replacement procedure.