GM Service Manual Online
For 1990-2009 cars only

Frame Replacement LNJ

Special Tools

J 43828 Ball Joint Remover

Removal Procedure


    Object Number: 857193  Size: SH
  1. Secure the radiator to the upper radiator support.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the front wheels. Refer to Tire and Wheel Removal and Installation.
  4. Remove the side splash shield-to-frame fasteners.
  5. Remove the front air dam-to-frame fasteners.

  6. Object Number: 1398176  Size: SH
  7. Remove the rear transaxle mount-to-frame bolts.

  8. Object Number: 1398177  Size: SH
  9. Remove the front transaxle mount through bolt.

  10. Object Number: 927957  Size: SH
  11. Remove the steering gear-to-frame bolts.
  12. Using mechanics wire, secure the steering gear to the exhaust.

  13. Object Number: 929945  Size: SH
  14. Remove the stabilizer shaft clamp-to-frame bolts.

  15. Object Number: 929893  Size: SH
  16. Remove the lower ball joint cotter pins. Discard the cotter pins.

  17. Object Number: 932518  Size: SH
  18. Loosen the lower ball joint castle nut until the nut is level with the top of the ball stud.
  19. Caution: Do not free the ball stud by using a pickle fork or a wedge-type tool. Damage to the seal or bushing may result.

  20. Using the J 43828 , separate the lower control arm from the steering knuckle.

  21. Object Number: 1398170  Size: SH
  22. Remove the frame-to-body bolts. Discard the bolts.
  23. Carefully lower the frame from the vehicle.
  24. Remove the lower control arms. Refer to Lower Control Arm Replacement.

Installation Procedure

  1. Install the lower control arms. Refer to Lower Control Arm Replacement.
  2. Raise the frame to the body.

  3. Object Number: 1398170  Size: SH

    Note: Do not tighten the fasteners at this time.

  4. Loosely install new frame-to-body bolts.

  5. Object Number: 1826244  Size: SH
  6. Connect the ball joint stud to the steering knuckle.
  7. Caution: Refer to Fastener Caution in the Preface section.

  8. Install the ball stud castle nut and tighten to 40 N·m (30 lb in).
  9. Note: 

       • Do not loosen the castle nut in order to align the cotter pin slots.
       • Ensure the cutter pin ends do not contact the wheel speed sensor harness.

  10. Continue to tighten the castle nut to align the slots with the opening in the ball stud and install the ball stud cotter pin.

  11. Object Number: 927957  Size: SH
  12. Remove the mechanics wire and install the steering gear to the frame. Tighten the bolts to 110 N·m (81 lb ft).

  13. Object Number: 1398177  Size: SH
  14. Install the front transaxle mount through bolt and tighten to 110 N·m (81 lb ft).

  15. Object Number: 1398176  Size: SH
  16. Install the rear transaxle mount-to-frame bolts and tighten to 50 N·m (37 lb ft).
  17. Install the stabilizer shaft clamp and tighten the bolts to 50 N·m (37 lb ft).
  18. Tighten the frame-to-body bolts to 155 N·m (114 lb ft).
  19. Install the front air dam fasteners.
  20. Install the side splash shield-to-frame fasteners.
  21. Install the front wheels. Refer to Tire and Wheel Removal and Installation.
  22. Lower the vehicle.
  23. Release the radiator from the upper radiator support.
  24. Align the front suspension. Refer to Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment.

Frame Replacement LY7

Special Tools

J 39580 Engine Support Table

Removal Procedure


    Object Number: 857193  Size: SH
  1. Secure the radiator, air conditioning condenser, and fan module assembly to the upper tie bar to keep the assembly with the vehicle when the frame is removed.
  2. Install the engine support fixture. Refer to Engine Support Fixture.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  4. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  5. Remove the engine splash shields. Refer to Engine Splash Shield Replacement.
  6. Remove the catalytic converters. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side.
  7. Remove the propeller shaft if the vehicle is equipped with AWD. Refer to Propeller Shaft Replacement.
  8. Remove both left and right stabilizer shaft insulator clamps. Refer to Stabilizer Shaft Insulator Replacement.

  9. Object Number: 1873841  Size: SH
  10. Remove the lower ball joints from the steering knuckles. Refer to Lower Control Arm Replacement.

  11. Object Number: 1873839  Size: SH

    Note: Whenever the steering gear is moved in relation to the body, disconnect the intermediate shaft from the steering gear.

  12. Disconnect the intermediate steering shaft from the steering gear. Refer to Intermediate Steering Shaft Replacement.

  13. Object Number: 1873840  Size: SH
  14. Remove the power steering gear mounting bolts (1) and secure the gear out of the way using mechanics wire or equivalent. Refer to Steering Gear Replacement.

  15. Object Number: 1954357  Size: SH
  16. Remove the front transmission mount thru bolt (1).

  17. Object Number: 1954361  Size: SH
  18. Remove the left transmission mount lower nuts (1).

  19. Object Number: 1954515  Size: SH
  20. Remove the rear transmission mount to frame bolts (1).

  21. Object Number: 1827873  Size: SH
  22. Remove the lower engine mount bracket to frame bolts (2).

  23. Object Number: 333118  Size: SH
  24. Lower the vehicle until the frame contacts the J 39580 .

  25. Object Number: 1874266  Size: SH
  26. Remove the frame reinforcements. Refer to Drivetrain and Front Suspension Frame Reinforcement Replacement.

  27. Object Number: 1874267  Size: SH
  28. Remove the front frame bolts.
  29. Raise the vehicle off of the frame.
  30. If replacing the frame, remove the lower control arms. Refer to Lower Control Arm Replacement.

Installation Procedure

  1. If removed, install the lower control arms. Refer to Lower Control Arm Replacement.

  2. Object Number: 333118  Size: SH
  3. Lower the vehicle on to the frame.
  4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1874267  Size: SH
  5. Install the front frame bolts and tighten to 155 N·m (114 lb ft).

  6. Object Number: 1874266  Size: SH
  7. Install the frame reinforcement. Refer to Drivetrain and Front Suspension Frame Reinforcement Replacement.
  8. Raise the vehicle off of the J 39580 .

  9. Object Number: 1827873  Size: SH
  10. Install the lower engine mount bracket to frame bolts (2) and tighten to 50 N·m (37 lb ft).

  11. Object Number: 1954515  Size: SH
  12. Install the rear transmission mount to frame bolts (1) and tighten to 50 N·m (37 lb ft).

  13. Object Number: 1954361  Size: SH
  14. Install the left transmission mount lower nuts (1) and tighten to 50 N·m (37 lb ft).

  15. Object Number: 1954357  Size: SH
  16. Install the front transmission mount thru bolt (1) and tighten to 110 N·m (81 lb ft).

  17. Object Number: 1873840  Size: SH
  18. Install the power steering gear mounting bolts (1). Refer to Steering Gear Replacement.

  19. Object Number: 1873839  Size: SH
  20. Install the intermediate steering shaft to the steering gear. Refer to Intermediate Steering Shaft Replacement.

  21. Object Number: 1873841  Size: SH
  22. Install the lower ball joints to the steering knuckles. Refer to Lower Control Arm Replacement.
  23. Install the propeller shaft if the vehicle is equipped with AWD. Refer to Propeller Shaft Replacement.
  24. Install the catalytic converters. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side.
  25. Install both left and right stabilizer shaft insulator clamps. Refer to Stabilizer Shaft Insulator Replacement.
  26. Install the engine splash shields. Refer to Engine Splash Shield Replacement.
  27. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  28. Remove the engine support fixture. Refer to Engine Support Fixture.

  29. Object Number: 857193  Size: SH
  30. Release the radiator, air conditioning condenser, and fan module assembly from the upper tie bar.
  31. Check the wheel alignment. Refer to Wheel Alignment Measurement.