GM Service Manual Online
For 1990-2009 cars only

Caution: Refer to Fastener Caution in the Preface section.

Special Tools

CH-49289 Centering Adapter Subframe Body

For equivalent regional tools, refer to Special Tools.

Removal Procedure

  1. Remove the front wheels. Refer to Tire and Wheel Removal and Installation.
  2. Remove the undertray.
  3. Remove the front fascia. Refer to Front Bumper Fascia Replacement.
  4. Tie the radiator, air conditioning condenser, and fan module assembly to the upper radiator support to keep the assembly with the vehicle when the frame is lowered.

  5. Object Number: 2018937  Size: MF
  6. Remove the resonator. Refer to Resonator Replacement.
  7. Remove the front transmission mount-to-frame bolt (1).

  8. Object Number: 2018923  Size: MF
  9. Separate the lower ball joint from the steering knuckle (1). Refer to Lower Control Arm Replacement.

  10. Object Number: 2018935  Size: MF
  11. Remove the electrical harness and the power steering cooler line from the clips in the frame (2).
  12. Carefully raise the CH-49289 centering adapter tool until the frame contacts.
  13. Remove the reinforcement bolts (2).

  14. Object Number: 2018936  Size: MF
  15. Remove the rear frame to body bolts (3). DISCARD the bolts.
  16. Remove the reinforcement (1) from the vehicle.
  17. Remove the front frame-to-body bolts (4). DISCARD the bolts.
  18. Remove the rear transmission mount-to-frame bolt (1).

  19. Object Number: 2018934  Size: MF
  20. Carefully lower the CH-49289 centering adapter tool in order to separate the frame from the body approximately 50 mm.
  21. Remove the stabilizer shaft clamp-to-frame bolts (2).
  22. Remove the steering gear-to-frame fasteners (3).
  23. Using mechanics wire, secure the steering gear and the stabilizer shaft properly to the vehicle.
  24. Carefully lower the CH-49289 centering adapter tool in order to separate the frame from the body.

Installation Procedure

  1. Carefully raise the CH-49289 centering adapter tool. The frame shall be approximately 50 mm from the body in order to get access with the torque wrench.
  2. Install the stabilizer shaft clamp to the frame.
  3. Tighten
    50 N·m (37 lb ft) + 22 degrees + 30-45 degrees

  4. Remove the mechanics wire and install the steering gear.
  5. Tighten
    110 N·m (81 lb ft) + 150 degrees + 15 degrees

  6. Install the electrical harness and the power steering cooler line to the clips in the frame (2).

  7. Object Number: 2018935  Size: MF

    Caution: Refer to Fastener Caution in the Preface section.

  8. Connect the ball joint stud to the steering knuckle (1). Refer to Lower Control Arm Replacement.
  9. Carefully raise the CH-49289 centering adapter tool in order to attach the frame to the body.
  10. Loosely install NEW front frame-to-body bolts (4).

  11. Object Number: 2018936  Size: MF
  12. Position the reinforcement (1) to the vehicle.
  13. Loosely install NEW rear frame to body bolts (3).
  14. Loosely install the reinforcement bolts (2).
  15. Carefully lower the CH-49289 centering adapter tool from the frame.
  16. Install the rear transmission mount-to-frame bolt (1).
  17. Tighten
    100 N·m (74 lb ft)


    Object Number: 2018934  Size: MF
  18. Tighten the frame-to-body reinforcement bolts (2).
  19. Tighten
    60 N·m (44 lb ft) + 30-45 degrees

  20. Tighten the frame-to-body bolts.
  21. Tighten
    160 N·m (118 lb ft)

  22. Install the front transmission mount-to-frame bolt (1).
  23. Tighten
    100 N·m (74 lb ft)


    Object Number: 2018923  Size: MF
  24. Untie the radiator, air conditioning condenser, and fan module assembly from the upper radiator support.
  25. Install the front fascia. Refer to Front Bumper Fascia Replacement.
  26. Install the undertray.
  27. Install the front wheels. Refer to Tire and Wheel Removal and Installation.
  28. Lower the vehicle.