Front Ball Joint Inspection

Special Tools 

J 8001  Dial Indicator Set

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
   IMPORTANT:

   • The vehicle must rest on a level surface.
   • The vehicle must be stable. Do not rock the vehicle on the floor stands.
2. Clean and inspect the ball joint seal for cuts or tears. If the ball joint seal is damaged, replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement .
3. Support the lower control arm with a floor stand as far outboard as possible and raise the suspension to just below ride height.
4. Install J 8001  Dial Indicator Set or a suitable dial indicator in a way to measure vehicle lash in the ball joint.
   Fig 1: Measuring Vertical Lash In Ball Joint

   Courtesy of GENERAL MOTORS COMPANY
5. Gently lift or pry the suspension to induce ball joint movement.
   IMPORTANT: Do not pry between the lower control arm and the wheel drive shaft boot.
6. If the dial indicator reading is more than 0.5 mm (0.020 in), replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement .