GM Service Manual Online
For 1990-2009 cars only

Knuckle Replacement All Wheel Drive

Tools required

J 41820 Ball Joint/Stud Separator.

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the rear wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Inspect the ball joint. Refer to Ball Joint Inspection .
  4. Remove the wheel bearing/hub. Refer to Rear Wheel Bearing and Hub Replacement .

  5. Object Number: 629521  Size: SH
  6. Use a utility stand in order to support the lower control arm.
  7. Disconnect the tie rod from the knuckle.
  8. If necessary, disconnect the height sensor link from the lower control arm.

  9. Object Number: 629210  Size: SH
  10. Disconnect the upper control arm from the knuckle.
  11. Loosen the lower ball joint nut, but DO NOT remove.

  12. Object Number: 378908  Size: SH
  13. Use the J 41820 in order to disengage the ball joint from the knuckle.
  14. Remove the J 41820 .

  15. Object Number: 629211  Size: SH
  16. Remove the ball joint to knuckle nut.
  17. Remove the knuckle from the vehicle.
  18. Remove the wheel speed sensor connector bracket.

Installation Procedure

  1. Install the wheel speed sensor connector bracket to the knuckle.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the wheel speed sensor connector bracket bolt and nut.
  4. Tighten
    Tighten the wheel speed sensor bracket nut to 12 N·m (106 lb in).


    Object Number: 629211  Size: SH
  5. Install the knuckle into the vehicle.
  6. Install the ball joint to the knuckle nut.
  7. Tighten
    Tighten the ball joint nut to 35 N·m (26 lb ft) plus 130 degrees.


    Object Number: 629210  Size: SH
  8. Connect the upper control arm to the knuckle.
  9. Tighten
    Tighten the upper control arm nut to 85 N·m (63 lb ft).

  10. If necessary, connect the height sensor link to the lower control arm.
  11. Connect the tie rod to the knuckle.
  12. Tighten
    Tighten the tie rod nut to 80 N·m (59 lb ft).


    Object Number: 629521  Size: SH
  13. Remove the utility stand supporting the lower control arm.
  14. Install the wheel bearing/hub. Refer to Rear Wheel Bearing and Hub Replacement .
  15. Install the rear wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  16. Lower the vehicle.