GM Service Manual Online
For 1990-2009 cars only

Ball Joint Inspection Lower Ball Joint

Tools Required

J 8001 Dial Indicator Set


    Object Number: 1550870  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. With the wheel and tire on the vehicle, lift the suspension corner by hand to determine if any looseness is present. If vertical free play is experienced proceed with the following instructions.
  3. Remove the wheel and tire. Refer to Tire and Wheel Removal and Installation.
  4. Clean and inspect the ball joint seals for cuts or tears. If the ball joint seals are damaged, replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement.
  5. Install and position the dial indicator from J 8001 against the end of the ball joint.
  6. Important: Do not pry between the lower arm and the wheel drive shaft boot or in such a manner that the ball joint seal is contacted. Damage to the wheel drive shaft boot will result (4WD).

  7. Gently lift or pry the suspension upward then let it settle.
  8. The dial indicator reading should be no more than 2 mm (0.079 in). If the reading is out of specification, replace the ball joint.

Ball Joint Inspection Upper Ball Joint

Tools Required

J 8001 Dial Indicator Set


    Object Number: 1550872  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. With the wheel and tire on the vehicle, lift the suspension corner by hand to determine if any looseness is present. If vertical free play is experienced proceed with the following instructions.
  3. Remove the wheel and tire. Refer to Tire and Wheel Removal and Installation .
  4. Support the lower control arm with a floor stand or jack, as far outboard as possible.
  5. If a seal is cut or torn, replace the ball joint.
  6. Clean and inspect the ball joint seals for cuts or tears. If the ball joint seals are damaged, replace the ball joint. Refer to Upper Control Arm Replacement .
  7. Check the wheel bearing for looseness in the wheel bearing is present. Refer to Wheel Bearings Diagnosis .
  8. Check the upper ball joint for vertical looseness.
  9. Remove the lower shock absorber mounting bolt. This will ensure that the suspension is unloaded.
  10. Install and position the dial indicator from J 8001 against the rim of the upper ball joint.
  11. Apply downward force to the upper control arm and zero the indicator pointer/pad against the rim of the upper ball joint.
  12. Release the arm and check the dial indicator. The dial indicator reading should be no more than 2 mm (0.079 in). If the reading is too high, replace the upper control arm. Refer to Upper Control Arm Replacement .