GM Service Manual Online
For 1990-2009 cars only

Converter Hanger Assembly Replacement 3.8L Automatic

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the catalytic converter.

  3. Object Number: 21664  Size: SH
  4. Remove the catalytic converter hanger bolts.
  5. Remove the catalytic converter hanger from the front hanger bracket.

  6. Object Number: 222998  Size: SH
  7. Remove the rear axle torque arm nuts.
  8. Remove the rear axle torque arm inner bracket bolts.
  9. Remove the catalytic converter front hanger bracket from the vehicle.

Installation Procedure


    Object Number: 222998  Size: SH
  1. Install the catalytic converter front hanger bracket to the vehicle.
  2. Install the rear axle torque arm inner bracket bolts.
  3. Install the rear axle torque arm nuts.
  4. Tighten
    Tighten the rear axle torque arm nuts to 45 N·m (33 lb ft).


    Object Number: 21664  Size: SH
  5. Install the catalytic converter hanger to the front hanger bracket.
  6. Install the catalytic converter hanger bolts.
  7. Tighten
    Tighten the catalytic converter hanger bolts to 41 N·m (30 lb  ft).

  8. Remove the support from the catalytic converter.
  9. Lower the vehicle.

Converter Hanger Assembly Replacement 3.8L Manual

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the catalytic converter.

  3. Object Number: 21664  Size: SH
  4. Remove the catalytic converter hanger bolts.
  5. Remove the hanger from the bracket.

  6. Object Number: 222996  Size: SH
  7. Remove the rear axle torque arm bracket nuts.
  8. Remove the catalytic converter front hanger bracket.

Installation Procedure


    Object Number: 222996  Size: SH
  1. Install the catalytic converter front hanger bracket.
  2. Install the rear axle torque arm bracket nuts.
  3. Tighten
    Tighten the rear axle torque arm bracket nut to 45 N·m (33 lb ft)


    Object Number: 21664  Size: SH
  4. Install the hanger to the bracket.
  5. Install the catalytic converter hanger bolts.
  6. Tighten
    Tighten the converter hanger bolts to 41 N·m (30 lb ft)

  7. Remove the support from the catalytic converter.
  8. Lower the vehicle.

Converter Hanger Assembly Replacement 5.7L

Removal Procedure

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the catalytic converter.

  3. Object Number: 222969  Size: SH
  4. Remove the catalytic converter hanger bolts.
  5. Remove the hanger from the bracket.

  6. Object Number: 222993  Size: SH
  7. Remove the rear axle torque arm bracket nuts.
  8. Remove the catalytic converter hanger bracket.

Installation Procedure


    Object Number: 21624  Size: SH
  1. Install the catalytic converter hanger to the bracket.
  2. Install the catalytic converter bracket to the rear axle torque arm inner bracket.
  3. Install the rear axle torque arm bracket nuts.
  4. Tighten
    Tighten the rear axle torque arm bracket nut to 41 N·m (30 lb ft).


    Object Number: 21685  Size: SH
  5. Install the catalytic converter hanger bolts.
  6. Tighten
    Tighten the converter hanger bolts to 41 N·m (30 lb ft).

  7. Remove the support from the catalytic converter.
  8. Lower the vehicle.