GM Service Manual Online
For 1990-2009 cars only

    Object Number: 153840  Size: SH
  1. Remove the following components from the valve body:
  2. • The bolt
    • The detent spring (2)
    • The plate (1)
    • The manual valve (3)

    Object Number: 153843  Size: SH
  3. Remove the 9 upper valve body bolts.

  4. Object Number: 153845  Size: SH
  5. Remove the 6 lower valve body bolts.

  6. Object Number: 469473  Size: SH

    Important: Press the separator plate and the gasket against the lower valve body in order to prevent the check balls and the springs from falling out of the lower valve body.

  7. Remove the rear upper valve body check balls from the lower valve body.
  8. Remove the 5 valve body bolts from the upper valve body (1) and remove the check balls.

  9. Object Number: 153848  Size: SH
  10. Inspect the front upper valve body for the proper locations of the valves (1,3) and the retaining clip.

  11. Object Number: 153849  Size: SH
  12. Inspect the rear upper valve body (1) for the proper locations of the check balls (2).

  13. Object Number: 153850  Size: SH
  14. Inspect the lower valve body (1) for the proper locations of the following components:
  15. • The bypass valve (3)
    • The check balls (6)
    • The primary regulator valve sleeve retainer (5)