GM Service Manual Online
For 1990-2009 cars only

Power Steering Pump Replacement 4.3L, 5.0L, 5.7L

Removal Procedure

Tools Required

J 25034-C Power Steering Pulley Remover


    Object Number: 309286  Size: SH
  1. Place a drain pan below the pump (2).
  2. Remove the pump drive belt. Install a 3/8 inch drive ratchet on the tensioner arm and rotate the arm counterclockwise.
  3. Disconnect the hoses at the pump.
  4. Raise the hose up in order to prevent drainage of the oil.

  5. Cap the ends of the hose and the pump in order to prevent the entrance of dirt.
  6. Disconnect the reservoir hose at the pump.
  7. Cap the pump fittings.
  8. Remove the pulley from the pump.
  9. Install the J 25034-C .
  10. Turn the nut to the top of the pilot bolt in order to ensure that the pilot bolt bottoms in the pump shaft.
  11. Hold the pilot bolt.
  12. Turn the nut counterclockwise.
  13. Remove the remaining pump line.
  14. Cap the connection.
  15. Remove the following parts:
  16. • The adjusting bolts (5)
    • The nuts (4)
    • The brackets (1, 3)
  17. Remove the pump from the vehicle.

Installation Procedure

Tools Required

J 25033-C Power Steering Pump Pulley Installer


    Object Number: 309286  Size: SH
  1. Install the brackets (1, 3) to the pump (2).
  2. Place the pulley on the end of the pump shaft.
  3. Install the J 25033-C .
  4. Turn the nut to the top of the pilot bolt in order to ensure that the pilot bolt bottoms in the pump shaft.
  5. Hold the pilot bolt.
  6. Turn the nut clockwise.
  7. Prior to mounting the pump, fill the pump housing with as much fluid as possible.
  8. Loosely install the pump assembly to the engine using the bolts (5) and the nuts (4).
  9. Important: 

       • Improperly installed hoses are subject to chafing and other abuses during sharp turns.
       • Do not start the engine with any disconnected power steering hoses. When the power steering hoses are connected, ensure that the hoses and the drive belt, the sheet metal, and any other components have clearance in order to avoid chafing or interference.

  10. Connect the power steering hoses to the pump. .
  11. Tighten
    Tighten the hose fittings to 27N·m (20 lb ft).

  12. Fill the reservoir.
  13. Turn the pulley counterclockwise as viewed from the front in order to bleed the pump in order to bleed the pump.
  14. Cease turning the pulley when air bubbles no longer appear.

    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.

  15. Tighten the steering pump mounting bolts.
  16. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  17. Install the pump drive belt. Install a 3/8 inch drive ratchet on the tensioner arm and rotate the arm counterclockwise.
  18. Fill the system with power steering fluid.
  19. Bleed the system. Refer to Power Steering System Bleeding .

Power Steering Pump Replacement 7.4L

Removal Procedure

Tools Required

J 25034-C Power Steering Pulley Remover

  1. Place a drain pan below the pump.
  2. Remove the pump drive belt. Install a 3/8 inch drive ratchet on the tensioner arm and rotate the tensioner arm counterclockwise.
  3. Remove the remaining pump line.
  4. Cap the connection.

  5. Object Number: 309287  Size: SH
  6. Remove the following parts:
  7. • The adjusting bolts (3)
    • The bracket (1)
  8. Remove the pump (2) from the vehicle.
  9. Disconnect the hoses at the pump.
  10. Raise the hose up in order to prevent drainage of the oil.

  11. Cap the ends of the hose and the pump in order to prevent the entrance of dirt.
  12. Disconnect the reservoir hose at the pump.
  13. Cap the pump fittings.
  14. Remove the pulley from the pump.
  15. Install the J 25034-C .
  16. Turn the nut to the top of the pilot bolt in order to ensure that the pilot bolt bottoms in the pump shaft.
  17. Hold the pilot bolt.
  18. Turn the nut counterclockwise.

Installation Procedure

Tools Required

J 25033-C Power Steering Pump Pulley Installer


    Object Number: 309287  Size: SH
  1. Install the bracket (1) to the pump (2).
  2. Place the pulley on the end of the pump shaft.
  3. Install the J 25033-C .
  4. Turn the nut to the top of the pilot bolt in order to ensure that the pilot bolt bottoms in the pump shaft.
  5. Hold the pilot bolt.
  6. Turn the nut clockwise.
  7. Prior to mounting the pump, fill the pump housing with as much fluid as possible.
  8. Loosely install the pump assembly to the engine using the bolts (2).
  9. Important: 

       • Improperly installed hoses are subject to chafing and other abuses during sharp turns.
       • Do not start the engine with any disconnected power steering hoses. When the power steering hoses are connected, ensure that the hoses and the drive belt, the sheet metal, and any other components have clearance in order to avoid chafing or interference.

  10. Connect the power steering hoses to the pump.
  11. Tighten
    Tighten the hose fittings to 27N·mN·m(20 lb ft).

  12. Fill the reservoir.
  13. Turn the pulley counterclockwise as viewed from the front in order to bleed the pump in order to bleed the pump.
  14. Cease turning the pulley when air bubbles no longer appear.

    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.

  15. Tighten the steering pump mounting bolts.
  16. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  17. Install the pump drive belt. Install a 3/8 inch drive ratchet on the tensioner arm and rotate the arm counterclockwise.
  18. Fill the system with power steering fluid.
  19. Bleed the system. Refer to Power Steering System Bleeding .

Power Steering Pump Replacement 6.5L

Removal Procedure

Tools Required

J 25034-C Power Steering Pulley Remover


    Object Number: 309288  Size: SH
  1. Place a drain pan below the pump (2).
  2. Remove the pump drive belt. Install a 3/8 inch drive ratchet on the tensioner arm and rotate the arm counterclockwise.
  3. Disconnect the hoses at the pump.
  4. Raise the hose up in order to prevent drainage of the oil.

  5. Cap the ends of the hose and the pump in order to prevent the entrance of dirt.
  6. Disconnect the reservoir hose at the pump.
  7. Cap the pump fittings.
  8. Remove the pulley from the pump.
  9. Install the J 25034-C .
  10. Turn the nut to the top of the pilot bolt in order to ensure that the pilot bolt bottoms in the pump shaft.
  11. Hold the pilot bolt.
  12. Turn the nut counterclockwise.
  13. Remove the remaining pump line.
  14. Cap the connection.
  15. Remove the following parts:
  16. • The adjusting bolts (1, 3)
    • The brackets (2)
    • The nuts
  17. Remove the pump from the vehicle.

Installation Procedure

Tools Required

J 25033-C Power Steering Pump Pulley Installer


    Object Number: 309288  Size: SH
  1. Install the brackets (2) to the pump.
  2. Place the pulley on the end of the pump shaft.
  3. Install the J 25033-C .
  4. Turn the nut to the top of the pilot bolt in order to ensure that the pilot bolt bottoms in the pump shaft.
  5. Hold the pilot bolt.
  6. Turn the nut clockwise.
  7. Prior to mounting the pump, fill the pump housing with as much fluid as possible.
  8. Loosely install the pump assembly to the engine using the bolts (1, 3).
  9. Important: 

       • Improperly installed hoses are subject to chafing and other abuses during sharp turns.
       • Do not start the engine with any disconnected power steering hoses. When the power steering hoses are connected, ensure that the hoses and the drive belt, the sheet metal, and any other components have clearance in order to avoid chafing or interference.

  10. Connect the power steering hoses to the pump.
  11. Tighten
    Tighten the hose fittings to 27N·m (20 lb ft).

  12. Fill the reservoir.
  13. Turn the pulley counterclockwise, as viewed from the front, in order to bleed the pump.
  14. Cease turning the pulley when air bubbles no longer appear.

    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.

  15. Tighten the steering pump mounting bolts.
  16. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  17. Install the pump drive belt. Install a 3/8 inch drive ratchet on the tensioner arm and rotate the arm counterclockwise.
  18. Fill the system with power steering fluid.
  19. Bleed the system. Refer to Power Steering System Bleeding .