GM Service Manual Online
For 1990-2009 cars only

Power Steering Cooler Pipe/Hose Replacement With Hydroboost

Removal Procedure

  1. Remove the front grille. Refer to Grille Replacement .

  2. Object Number: 686126  Size: SH

    Notice: Do not start the vehicle with any power steering gear inlet or outlet hoses disconnected. When disconnected, plug or cap all openings of components. Failure to do so could result in contamination or loss of power steering fluid and damage to the system.

  3. Place a drain pan under the vehicle.
  4. Siphon the fluid from the reservoir to prevent excess spillage.
  5. Remove the clamp retaining the power steering cooler inlet hose (3) to the power steering gear (2).
  6. Remove the clamp retaining power steering cooler outlet hose (5) to the power steering pump (1).

  7. Object Number: 686121  Size: SH
  8. Remove the bolts (2) retaining the power steering cooler from the radiator support.
  9. Remove the power steering cooler from the vehicle.

Installation Procedure


    Object Number: 686121  Size: SH

    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.

  1. Install the power steering cooler (1) to the radiator support.
  2. Tighten
    Tighten the bolts retaining the power steering cooler to 5 N·m(44 lb in).


    Object Number: 686126  Size: SH
  3. Install the power steering cooler outlet hose (3) to the power steering pump (2).
  4. Install the retaining clamp.
  5. Install the power steering inlet hose (5) to the power steering gear (1).
  6. Install the retaining clamp.
  7. Fill and bleed the power steering system. Refer to Power Steering System Bleeding .
  8. Inspect all the hose connections for leaks.
  9. Install the front grille. Refer to Grille Replacement .