GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Sierra - 4WD 🢒 Steering 🢒 Power Steering System 🢒 Power Steering Fluid Reservoir Replacement - Off Vehicle

Power Steering Fluid Reservoir Replacement - Off Vehicle W/O Hydro Boost

Disassembly Procedure

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

    5. Object Number: 404928 Size: SH
  5. If replacement is required, remove the control valve assembly (2) and the flow control spring (3) from the pump housing assembly (1).

    6. Object Number: 404931 Size: SH
  6. Remove the reservoir assembly (1) from the 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. 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 spring (7) to the pump housing assembly (2).
  3. Install the control valve assembly (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. Object Number: 404915 Size: SH
  8. Install the connector and fitting assembly (4) to the pump housing (1).
  9. See

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Fastener Notice
  10. Install the pump mounting studs (2) to the pump housing (1).

    11. Tighten
    Tighten the pump mounting studs to 35-80 N·m (29-59 lb ft).

  11. Tighten the connector and fitting assembly.

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