GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2008 🢒 H2 🢒 Steering 🢒 Power Steering 🢒 Power Steering Fluid Reservoir Replacement - Off Vehicle

Disassembly Procedure

    Object Number: 404915 Size: SH
  1. Drain the power steering fluid from the power steering pump.
  2. Remove the 2 power steering pump mounting studs (2).
  3. Remove the power steering flow control valve fitting (4).
  4. Remove the flow control valve O-ring seal (3).

    5. Object Number: 404928 Size: SH
  5. Remove the flow control valve (2) and the flow control valve spring (3) from the power steering pump housing (1).

    6. Object Number: 404931 Size: SH
  6. Remove the power steering reservoir (1) from the power steering pump housing assembly (2).

    7. Object Number: 404947 Size: SH
  7. Remove the O-ring seals (1) (4) (5).
  8. Remove the magnet (3).
  9. Clean the magnet (3).
  10. Inspect the welch plug in the power steering pump housing (2). Do not remove the welch plug. If the welch plug is deformed or dislodged, replace the power steering pump housing (2).

Assembly Procedure

    Object Number: 297997 Size: SH

    Important: Use new O-ring seals when assembling the power steering pump assembly.

  1. Lubricate the O-ring seals (1) (4) (5) with power steering fluid.
  2. Install the flow control valve spring (7) to the pump housing assembly (2).
  3. Install the control valve  (6) to the flow control spring (7).
  4. Install the O-ring seals (1) (4) (5) to the pump housing assembly.
  5. Install the magnet (3) to the pump housing assembly (2).

    6. Object Number: 404931 Size: SH
  6. Connect the reservoir assembly (1) to the pump housing assembly (2).
  7. Install the O-ring seal.

    8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 404915 Size: SH
  8. Install the connector and fitting assembly (4) to the pump housing (1).
  9. Install the 2 power steering pump mounting studs (2) to the pump housing (1).

    10. Tighten
    Tighten the pump mounting studs to 58 N·m (44 lb ft).

  10. Tighten the power steering flow control valve fitting.

    11. Tighten
    Tighten the connector and fitting assembly to 75 N·m (55 lb ft).