GM Service Manual Online
For 1990-2009 cars only

Tools Required

SA9132S Lower Control Arm Ball Stud Separator

Removal Procedure


    Object Number: 859109  Size: SH

    Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.

  1. Raise the vehicle on a hoist with the steering in an unlocked position.
  2. Remove the left wheel and tire.
  3. Remove and discard the left lower control arm ball stud cotter pin.

  4. Object Number: 871526  Size: SH

    Notice: Do not attempt to separate the joint using a wedge-type tool because seal may be damaged.

    Notice: Care must be taken to prevent damage to the speed sensor ring on ABS vehicles. Minor surface damage to the speed sensor ring can result in ABS system malfunctions.

  5. Loosen (do not remove) the left lower control arm ball stud castle nut, until the top of the castle nut is level with the top of the ball stud.
  6. For left side of vehicle, use SA9132S (or equivalent) to separate the lower control arm from the knuckle.

  7. Object Number: 860035  Size: SH
  8. For left side of vehicle, remove the lower control arm ball stud castle nut.
  9. Important: Remove the front section of the splash shield first, then the rear.

  10. Remove the left side splash shield.
  11. 7.1. Remove the 2 push pins.

            Important: If the molded-in fasteners are damaged or broken, drill out with a 5/16-in. bit and replace with a push pin.

    7.2. Remove the lower shield to cradle the molded-in fasteners at the cradle by gently prying at the 3 fastener locations.

    Object Number: 861798  Size: SH
  12. For the left side of vehicle, remove the lower control arm-to-cradle fastener.

  13. Object Number: 864957  Size: SH

    Important: The front wheels should be turned to the left to allow access to the nut.

  14. For right side of vehicle, remove the front stabilizer shaft-to-lower control arm nut and washer.
  15. Important: If the front stabilizer-to-cradle strut nut becomes damaged due to corrosion, cross-threading, etc., or is broken loose from the cradle, it can be replaced using the following procedure:

  16. Remove the front stabilizer shaft-to-cradle mounting bracket fasteners.

  17. Object Number: 859918  Size: SH
    • If the nut is broken loose from the cradle and the bolt is locked in the nut, proceed to steps 10.3, 10.4, and 10.5.
    • If nut is not broken loose from cradle, but is damaged and the bolt is removed:
    10.1. Distort the threads of the service bolt sufficiently to cause the bolt to lock into the nut.
    10.2. Install the bolt, and using an air impact wrench, continue turning the bolt until the nut is broken loose from the cradle.
    10.3. Cut off the bolt head.
    10.4. Retrieve the bolt shank and nut from the cradle cavity.
    10.5. Install the new bolt (P/N 21010823) and repair the nut (P/N 21006321).
  18. Remove the front stabilizer shaft (with left control arm) from the vehicle.
  19. Remove the left control arm-to-front stabilizer shaft nut and washer from the front stabilizer shaft.
  20. Remove the left control arm from the front stabilizer shaft.

Installation Procedure

Important: The front stabilizer shaft can be installed UPSIDE DOWN. All front stabilizer shafts are marked with paint on the right hand side. Make sure this paint mark end is installed into the right control arm. If the paint mark is not visible, make sure the front stabilizer shaft turns upward between the attachment brackets.

(1) Proper Installation.

(2) Improper Installation.


    Object Number: 859126  Size: SH

    Important: Do not tighten the fasteners at this time.

  1. With the front stabilizer shaft off of vehicle, position the left control arm onto the front stabilizer shaft with the washer and nut.
  2. Important: The front stabilizer shaft-to-cradle bushings must be positioned in the attachment brackets with their installation slits facing toward the front of the vehicle.

  3. Install the front stabilizer shaft-to-cradle bushings onto the front stabilizer shaft.
  4. Position the right end of front stabilizer shaft into the right control arm (on vehicle).
  5. Important: Do not install the fasteners at this time.

  6. Position the left control arm into the frame.
  7. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 859690  Size: SH

    Important: New bolts or Loctite 242® (or equivalent), must be installed.

  8. Install the front stabilizer shaft attachment brackets to the frame with the fasteners and tighten.
  9. Tighten
    Tighten the Front Stabilizer Shaft Attachment Bracket-to-Frame to 140 N·m to (103 lb ft).

  10. Tighten the front stabilizer shaft-to-cradle fasteners a second time.
  11. Tighten
    Tighten the Front Stabilizer Shaft Attachment Bracket-to-Frame to 140 N·m (103 lb ft).


    Object Number: 861146  Size: SH
  12. Install the left road wheel onto the vehicle.
  13. Important: Tighten the wheel fasteners, but do not torque at this time.

  14. With the aid of an assistant, push the bottom of the left road wheel into the vehicle. This will move the left control arm into a position that will allow the control arm to cradle the fastener to be installed.

  15. Object Number: 861798  Size: SH
  16. Install the left lower control arm-to-frame fastener.
  17. Tighten
    Tighten the Control Arm-to-Frame Bolt to 125 N·m (92 lb ft).

    Tighten
    Tighten the Control Arm-to-Frame Nut to 100 N·m (74 lb ft).


    Object Number: 864957  Size: SH

    Important: Use new nut. Torque retention of the old nut may not be sufficient.

  18. Install the right control arm-to-front stabilizer shaft nut and washer and tighten to specification.
  19. Tighten
    Tighten the Control Arm-to-Front Stabilizer Shaft Nut to 144 N·m (106 lb ft).

    Important: Use new nut. Torque retention of old nut may not be sufficient.

    Important: Lower control arm ball stud threads should be thoroughly cleaned and lubricated before tightening the nut.

  20. Tighten the control arm-to-front stabilizer shaft nut to specification.
  21. Tighten
    Tighten the Control Arm-to-Front Stabilizer Shaft Nut to 144 N·m (106 lb ft).


    Object Number: 859109  Size: SH

    Important: If necessary to rotate the castle nut to orient to hole in the stud, always tighten the nut -- never loosen it.

  22. For the left side of vehicle, connect the ball stud to the steering knuckle with the fastener.
  23. Tighten
    Tighten the Ball Joint Stud Castle Nut to 75 N·m (55 lb ft).

  24. Install the new cotter pin.

  25. Object Number: 860035  Size: SH

    Important: Install the rear section of the splash shield first, then the front.

  26. Install the left side splash shield.
  27. Install the tabs in the body cut-out.
  28. Important: Make sure the splash shield flaps are tucked in at the body locations.

  29. Align the molded-in shield fasteners with the holes in the cradle. Push straight in to install.
  30. Install the push pins.
  31. Notice: Before installing wheels, remove rust or corrosion from wheel mounting surfaces and brake rotors/drums. Failure to do so can cause wheel nuts to loosen in service.

  32. Position the wheel onto hub.
  33. Install the wheel nuts and tighten in a crisscross pattern. Repeat the tightening pattern to make sure the torque is correct.
  34. Tighten
    Tighten the Wheel Nuts to 140 N·m (103 lb ft).

  35. Lower the vehicle from the hoist.
  36. Perform a vehicle wheel alignment. Refer to Wheel Alignment Specifications