GM Service Manual Online
For 1990-2009 cars only

Steering Gear Cylinder Pipe Assembly and Seals Replacement - Off Vehicle HPS

Removal Procedure


    Object Number: 796366  Size: SH

    Important: Protect the boots from sharp tools and from the sharp edges of surrounding components.

  1. Remove the fastener (1) from the cylinder line retaining plate (2) at the valve end.
  2. Remove the cylinder line retaining plate (2).

  3. Object Number: 796368  Size: SH
  4. Loosen both cylinder line nuts (3) on cylinder end of the gear assembly (1).
  5. Remove both cylinder line assemblies (2) from the rack and pinion gear assembly (1).
  6. Remove and discard the O-rings seals (4) from the valve end (5).

Installation Procedure


    Object Number: 796369  Size: SH
  1. Inspect the cylinder lines (1) for the following items:
  2. • Cracks
    • Dents
    • Damage to the threads
  3. Replace the parts as needed.
  4. Lubricate and install the O-rings seals (2) onto the cylinder lines (1).

  5. Object Number: 796370  Size: SH

    Important: You must install the smaller cylinder line into the valve housing (3) first.

  6. Place the smaller cylinder line (2) into the valve housing (3).
  7. Important: Hold the smaller cylinder line (2) in place . Do not torque the cylinder line nut (1).

  8. Place the other end of the cylinder line at the gear tube end (4).
  9. Finger tighten the cylinder line nut (1) on the smaller cylinder line.


    Object Number: 796371  Size: SH

    Important: You must install the larger cylinder line into the valve housing (3) first.

  10. Place the larger cylinder line (2) into the valve housing (3).
  11. Important: Hold the larger cylinder line (2) in place. Do not torque the cylinder line nut (1).

  12. Place the other end of the cylinder line at the gear tube end (4).
  13. Finger tighten the cylinder line nut (1) on the larger cylinder line.


    Object Number: 796372  Size: SH
  14. Place the cylinder line retaining plate (2) over the cylinder line beads at the valve end.
  15. Notice: Refer to Fastener Notice in the Preface section.

  16. Install the fastener (1) into the cylinder line retaining plate (2) and tighten.
  17. Tighten
    Tighten the screw to 15 N·m (12 lb ft).

  18. Tighten both cylinder line nuts (3) at the cylinder end.
  19. Tighten
    Tighten the nuts to 31 N·m (23 lb ft).