GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1999 🢒 S/T Isuzu - 4WD 🢒 Steering 🢒 Power Steering System 🢒 Steering Gear Replacement

Steering Gear Replacement RWD

Removal Procedure

Notice: Do not rotate steering shaft after steering column has been removed. Damage to SIR components may occur.

  1. Remove the air cleaner assembly.

    2. Object Number: 395770 Size: SH
  2. Place a drain pan below the steering gear.
  3. Remove the pressure and the return hoses from the power steering gear.

    4. Cap or tape the ends of the hoses and the gear fittings in order to prevent dirt from entering the system.


    Object Number: 288800 Size: SH
  4. Remove the intermediate shaft shield from the steering gear.

    5. Object Number: 692 Size: SH
  5. Remove the lower intermediate shaft coupling bolt.
  6. Draw alignment marks on the lower intermediate shaft coupling and the steering shaft.
  7. Remove the lower intermediate shaft coupling from the steering shaft.
  8. Remove the pitman arm. Refer to Pitman Arm Replacement in Steering Linkage.

    9. Object Number: 288824 Size: SH
  9. Remove the steering gear mounting bolts and the washers from the frame.
  10. Remove the steering gear.

Installation Procedure

    Object Number: 288824 Size: SH
  1. Install the steering gear.

    2. 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.

  2. Install the power steering gear to the frame washers and the mounting bolts.

    3. Tighten
    Tighten the power steering gear to frame mounting bolts to 75 N·m (55 lb ft).

  3. Install the pitman arm. Refer to Pitman Arm Replacement in Steering Linkage.

    4. Object Number: 692 Size: SH
  4. Install the lower intermediate shaft to the power steering gear.

    5. Ensure that the alignment marks line up.

  5. Install the lower intermediate shaft coupling bolt.

    6. Tighten
    Tighten the lower intermediate shaft coupling bolt to 35 N·m (26 lb ft).


    Object Number: 288800 Size: SH
  6. Install the intermediate shaft shield to the power steering gear.

    7. Object Number: 395770 Size: SH
  7. Install the pressure and the return hoses to the power steering gear.

    8. Tighten

        • Tighten the pressure hose to 25 N·m (18 lb ft) for the vehicle equipped with the 2.2L engines.
        • Tighten the pressure hose to 30 N·m (22 lb ft) for the vehicle equipped with the 4.3L engines.
        • Tighten the return hose to 25 N·m (18 lb ft).
  8. Install the air cleaner assembly.
  9. Bleed the power steering system. Refer to Power Steering System Bleeding .

Steering Gear Replacement 4WD

Removal Procedure

Tools Required

J 24319-B Steering Linkage Puller

Notice: Do not rotate steering shaft after steering column has been removed. Damage to SIR components may occur.

  1. Remove the air cleaner assembly.

    2. Object Number: 395770 Size: SH
  2. Place a drain pan below the steering gear.
  3. Remove the pressure and the return hoses from the power steering gear.

    4. Cap or tape the ends of the hoses and the gear fittings in order to prevent dirt from entering the system.


    Object Number: 288800 Size: SH
  4. Remove the intermediate shaft shield from the steering gear.

    5. Object Number: 692 Size: SH
  5. Remove the lower intermediate shaft coupling bolt.
  6. Draw alignment marks on the lower intermediate shaft coupling and the steering shaft.
  7. Remove the lower intermediate shaft coupling from the steering shaft.
  8. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  9. Remove the steering linkage shield. Refer to Steering Linkage Shield Replacement in Steering Linkage.

    10. Object Number: 141840 Size: SH
  10. Remove differential carrier shield mounting bolts.
  11. Remove the differential carrier shield.

    12. Object Number: 291254 Size: SH
  12. Remove the pitman arm ball stud nut at the relay rod.

    13. Object Number: 397366 Size: SH
  13. Disconnect pitman arm from relay rod using J 24319-B .

    14. Object Number: 288824 Size: SH
  14. Remove the steering gear mounting bolts and the washers from the frame.
  15. Remove the steering gear.
  16. Remove the pitman arm. Refer to Pitman Arm Replacement in Steering Linkage.

Installation Procedure

Tools Required

    • J 29193 Steering Linkage Installer (12 mm)
    • J 29194 Steering Linkage Installer (14 mm)

    Object Number: 288824 Size: SH
  1. Install the pitman arm. Refer to Pitman Arm Replacement in Steering Linkage.
  2. Install the steering gear.

    3. 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.

  3. Install the power steering gear to the frame washers and mounting bolts.

    4. Tighten
    Tighten the power steering gear to frame mounting bolts to 75 N·m (55 lb ft).


    Object Number: 291254 Size: SH
  4. Connect the relay rod to the pitman arm ball stud.

    5. Ensure the seal is on the stud.

  5. Seat the taper using J 29193 or J 29194 .

    6. Tighten
    Tighten J 29193 or J 29194 to 62 N·m (48 lb ft).

  6. Remove J 29193 or J 29194 from the pitman arm ball stud.
  7. Install the new nut to the pitman arm ball stud at the relay rod.

    8. Tighten
    Tighten the pitman arm ball stud nut at the relay rod to 83 N·m (61 lb ft).


    Object Number: 141840 Size: SH
  8. Install differential carrier shield.
  9. Install the differential carrier shield mounting bolts.
  10. Install the steering linkage shield. Refer to Steering Linkage Shield Replacement in Steering Linkage.
  11. Lower the vehicle.

    12. Object Number: 692 Size: SH
  12. Install the lower intermediate shaft to the power steering gear.
  13. Ensure that the alignment marks line up.
  14. Install the lower intermediate shaft coupling bolt.

    15. Tighten
    Tighten the lower intermediate shaft coupling bolt to 35 N·m (26 lb ft).


    Object Number: 288800 Size: SH
  15. Install the intermediate shaft shield to the power steering gear.

    16. Object Number: 395770 Size: SH
  16. Install the pressure and return hoses to the power steering gear.

    17. Tighten

        • Tighten the pressure hose to 30 N·m (22 lb ft).
        • Tighten the return hose to 25 N·m (18 lb ft).
  17. Install the air cleaner assembly.
  18. Bleed the power steering system. Refer to Power Steering System Bleeding .