GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the pump assembly from the vehicle. Refer to Power Steering Pump and Bracket .

  2. Object Number: 164856  Size: SH
  3. Remove the O-ring union fitting from the housing and discard the O-ring seal from the fitting.
  4. Remove the control valve assembly from the housing.
  5. Remove the flow control spring from the housing.

Installation Procedure


    Object Number: 164856  Size: SH
  1. Install the flow control spring to the housing.
  2. Install the control valve assembly to the housing.
  3. Install the new O-ring seal onto the union fitting lubricated with power steering fluid.
  4. Install the union fitting into the pump housing.
  5. Tighten
    Tighten the union fitting (16) to 75.0 N·m (55 lb ft).

    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.

  6. Install the pump assembly to the vehicle. Refer to Power Steering Pump and Bracket .