GM Service Manual Online
For 1990-2009 cars only

Replace the ball joints if any looseness is detected in the joint, or if the ball joint seal is cut.

In order to inspect the ball joints, raise the front of the vehicle allowing the front suspension to hang free. Grasp the tire at the top and the bottom and move the top of the tire with an in-and-out motion. Observe the ball joint for any horizontal movement of the steering knuckle relative to the front lower control arm.


Object Number: 400852  Size: SH

Replace the ball joint if the following conditions exist:

  1. If the ball stud (1) is disconnected from the steering knuckle and any looseness is detected
  2. If the ball stud (1) can be twisted in the socket using finger pressure

Also inspect the ball stud tightness in the steering knuckle boss when inspecting the ball joint. Shake the wheel and feel for movement of the stud end or the castellated nut at the knuckle boss. Verifying the castellated nut tightening specification is an alternative method of inspecting for wear. A loose nut can indicate a bent stud or an opened-up hole in the knuckle boss. Replace worn or damaged ball joints and knuckles.