GM Service Manual Online
For 1990-2009 cars only

Each wheel has one wheel lock nut. The wheel lock nut requires a special tool (key) to remove it. This tool is stored in a small depression in the frame rail located directly under the left-hand rear compartment cover.

To remove the wheel lock nut perform the following procedure:

  1. Remove the wheel nut cap.
  2. Install the lock nut key to the wheel lock nut until the key is firmly seated.
  3. Important: Do Not use an air operated tool on the lock nut key.

  4. Use a 19mm socket to rotate the key counterclockwise.
  5. Remove the wheel lock nut.