GM Service Manual Online
For 1990-2009 cars only

Disassemble Procedure

Tools Required

    • J 34013-B Strut Compressor
    • J 34013-20 Damper Rod Clamp
    • J 34013-197 Alignment Rod
    • J 34013-125 Upper Strut Adapter
    • J 34013-971 Lower Strut Adapter
    • J 42991 Strut Nut Socket
  1. Remove the strut from the vehicle. Refer to Strut Assembly Replacement .

  2. Object Number: 405306  Size: SH
  3. Install the strut to the J 34013-B . Use wing nuts to secure the tool to the mounting holes C (1) and E/K (3). Position the wide end of the adapter outboard.
  4. Important: Align the J 34013-971 and the J 34013-125 so that the tools may open and close together. The tools will not open If the tools do not align properly.

  5. Install the J 34013-971 and the J 34013-125 .
  6. Install the strut to the top of the J 34013-B .
  7. Install the strut into theJ 34013-971 and the J 34013-125 .
  8. Close theJ 34013-971 and the J 34013-125 .
  9. Install the locking pins through the holes of J 34013-971 and the strut lower mounting holes.
  10. Turn the screw (3) on the J 34013-B counterclockwise to raise the strut up to the J 34013-125 .
  11. Compress the spring approximately 13 mm (0.50 in) or three to four complete turns of the operating screw.
  12. Caution: Do not over compress the spring. Severe overloading may cause tool failure which could result in bodily injury.

  13. Insert the J 42991 on the nut.
  14. Hold shaft with a T-45 Torx® bit.
  15. Use the J 42991 to remove the nut while preventing the rod from rotating with a T-45Torx® bit.
  16. Discard the strut nut.
  17. Turn the operating screw (3) on the J 34013-B clockwise to fully relieve the spring compression.

Assemble Procedure


    Object Number: 176773  Size: SH
  1. Install the strut to the J 34013-B . Use wing nuts to secure the tool to the mounting holes C and E/K. Position the wide end of the adapter outboard.
  2. Important: Align the J 34013-971 and the J 34013-125 so that the tools may open and close together. The tools will not open if the tools are not aligned properly.

  3. Install the J 34013-971 and the J 34013-125 .
  4. Install the strut to the J 34013-971 and the J 34013-125 .
  5. Close the J 34013-971 and the J 34013-125 .
  6. Important: 

       • Use only one pin for mounting.
       • Position the top of the shock absorber flat against J 34013-125. The shock absorber will not align correctly if the shock absorber does not lay flat against the tool.

  7. Install the locking pin through the lower hole of the J 34013-B and the lower knuckle mounting hole of the strut.
  8. Install the strut to the top of the J 34013-B .

  9. Object Number: 405306  Size: SH
  10. Install the spring to the strut. Ensure to position the upper and lower spring seats correctly.
  11. Install the remaining components to the strut.
  12. Fully extend the strut shaft.
  13. Attach the J 34013-20 . This prevents the shaft from retracting during compression.
  14. Important: Align the J 34013-197 Alignment Rod straight with the strut. If the J 34013-197 Alignment Rod is not aligned, repeat steps 1 through 12 until the tool is straight.

  15. Insert the J 34013-197 Alignment Rod down through the top of the J 34013-B and onto the shaft.
  16. Slowly turn the operating screw counterclockwise in order to compress the spring until the threaded portion of the strut shaft is through the top of the strut.
  17. Caution: Do not over compress the spring. Severe overloading may cause tool failure which could result in bodily injury.

    Notice: Keep the strut rod in a stationary position when you tighten the strut nut. Turning the strut rod may damage the strut.

  18. Insert a new strut nut on the strut rod.
  19. 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.

  20. Place the J 42991 on the shock absorber nut.
  21. Tighten
    Tighten the shock absorber rod to upper mount to 75 N·m (55 lb ft).

  22. Insert a T-45 torx® through the J 34013-197 Alignment Rod .
  23. Tighten the shock absorber nut while holding the shaft with a T-45 torx®.
  24. Remove the following tools from the J 34013-B :
  25. 17.1. Remove the J 34013-20 .
    17.2. Remove the J 34013-197 Alignment Rod.
    17.3. Remove the J 42991 .
  26. Remove the strut from the J 34013-B .
  27. Install the strut to the vehicle. Refer to Strut Assembly Replacement .