GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 41688 Centering Sphere Installer

Removal Procedure

    Caution: Refer to SIR Caution in the Preface section.


    Object Number: 609483  Size: SH
  1. Disable the SIR system. Refer to SIR Disabling and Enabling .
  2. Remove the steering column from the vehicle. Refer to Steering Column Replacement .
  3. Remove the steering wheel. Refer to Steering Wheel Replacement .
  4. Remove the turn signal switch housing. Refer to Turn Signal Switch Housing Replacement .
  5. Remove the tilt spring. Refer to Steering Column Tilt Spring Replacement .
  6. Remove the steering wheel position sensor (3). Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement .
  7. Remove the steering column tilt head assembly. Refer to Steering Column Tilt Head Replacement .

  8. Object Number: 377014  Size: SH
  9. Remove the steering shaft assembly from the steering column support assembly.

  10. Object Number: 295954  Size: SH

    Important: Mark the race and upper shaft assembly and the lower shaft assembly to ensure proper assembly. Failure to assemble properly will cause the steering wheel to be turned 180 degrees.

  11. Tilt the race and upper shaft assembly 90 degrees to the lower shaft assembly and disengage. If necessary, remove and discard the old centering sphere and spring.

  12. Object Number: 299885  Size: SH
  13. Insert the race and upper shaft assembly (1) into J 41688 .
  14. Insert J 41688 into a vise.
  15. Rotate the driver 90 degrees in the counterclockwise direction in order to disengage the centering sphere from the race and upper shaft assembly.
  16. Remove the race and upper shaft assembly (1) from J 41688 .
  17. Remove the shaft preload spring and the centering sphere from J 41688 .
  18. If necessary, discard the old centering sphere and the old shaft preload spring.

Installation Procedure


    Object Number: 332949  Size: SH
  1. Lubricate the centering sphere (1) with lithium grease.
  2. Install the centering sphere (1) and the joint preload spring (2) into J 41688 .

  3. Object Number: 299881  Size: SH
  4. Compress the centering sphere and joint preload spring. Rotate the driver 90 degrees in the clockwise direction until the arms lock in place.

  5. Object Number: 299885  Size: SH
  6. Install the race and upper shaft assembly (1). Rotate the race and upper shaft assembly 90 degrees.

  7. Object Number: 299887  Size: SH
  8. Remove the race and upper shaft assembly with J 41688 . Rotate the race and upper shaft assembly 90 degrees and remove.

  9. Object Number: 299888  Size: SH
  10. Apply lithium grease to the exposed shaft engagement areas and then install the steering shaft to the centering sphere.

  11. Object Number: 377014  Size: SH
  12. Install the steering shaft assembly to the steering column jacket assembly.
  13. Install the steering column tilt head assembly. Refer to Steering Column Tilt Head Replacement .

  14. Object Number: 322997  Size: SH
  15. Install the adapter and bearing assembly (4).
  16. Install the lower bearing seat (3).
  17. Install the lower bearing spring (2).
  18. Install the lower spring retainer (1).

  19. Object Number: 371181  Size: SH
  20. The upper steering shaft assembly must be rotated to the center position with the block tooth (1) in the 12 o'clock position.

  21. Object Number: 609484  Size: SH
  22. Install the steering wheel position sensor (1). Refer to Steering Wheel Position Sensor Centering .

  23. Object Number: 323006  Size: SH
  24. Install the sensor retainer (1). Align the slots of the sensor retainer to the ribs of the adapter and bearing assembly. Push the sensor retainer (1) until it contacts the analog extended range sensor assembly.
  25. Install the steering shaft seal (2).
  26. Install the steering column tilt head assembly. Refer to Steering Column Tilt Head Replacement .
  27. Install the steering wheel position sensor. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement .
  28. Install the tilt spring. Refer to Steering Column Tilt Spring Replacement .
  29. Install the turn signal switch housing. Refer to Turn Signal Switch Housing Replacement .
  30. Install the steering wheel. Refer to Steering Wheel Replacement .
  31. Install the steering column from the vehicle. Refer to Steering Column Replacement .
  32. Enable the SIR system. Refer to SIR Disabling and Enabling .