GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 525070  Size: LH
  1. Remove the power steering pump from the vehicle. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement or Power Steering Pump Replacement .
  2. Remove the power steering pump reservoir. Refer to Power Steering Fluid Reservoir Replacement - Off Vehicle or Power Steering Fluid Reservoir Replacement - Off Vehicle .
  3. Remove the retaining ring (3).
  4. Remove the end plate (4) and the spring (5).

  5. Object Number: 525086  Size: SH

    Important: Examine the exposed portion of the pump drive shaft. If corrosion is evident, clean the drive shaft with crocus cloth before removing the shaft. This will prevent damage to the shaft bushing which may require replacement of the entire housing.

  6. Remove the pressure plate(10) by using a rubber mallet to tap lightly on the drive shaft (5).
  7. Remove the pump ring (9).
  8. Remove the pump vanes (8).
  9. Remove the shaft, the rotor and the thrust plate assembly.
  10. Remove the shaft retaining ring (11).
  11. Remove the pump rotor (7).
  12. Remove the thrust plate (13).
  13. Remove the drive shaft (15).
  14. Remove the dowel pins (14).
  15. Remove the O-ring seals (2 and 3).

Installation Procedure

Important: Use new seals and a new drive shaft retaining ring when assembling the pump.


    Object Number: 525086  Size: SH
  1. Lubricate the O-ring seals (2 and 3) with power steering fluid.
  2. Install the O-rings (2 and 3) to the housing (1).
  3. Install the dowel pins (14) to the housing (1).
  4. Install the thrust plate (13) and the pump rotor (12) to the drive shaft (15) and secure with the retaining ring (11).
  5. Install the shaft, the rotor and the thrust plate assembly to the housing (1).
  6. Install the pump vanes (8) to the pump rotor (12).
  7. Install the pump ring (9) to the housing (1).
  8. The identification arrows on the top edge of the ring (9) must face outward.

  9. Install the pressure plate (10).

  10. Object Number: 525070  Size: LH
  11. Install the spring (5) and the end plate (4).
  12. Install the retaining ring (3).
  13. Install the pump reservoir. Refer to Power Steering Fluid Reservoir Replacement - Off Vehicle or Power Steering Fluid Reservoir Replacement - Off Vehicle .
  14. Install the power steering pump. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement or Power Steering Pump Replacement .