GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Exhaust Service Caution in the Preface section.

Caution: Refer to Protective Goggles and Glove Caution in the Preface section.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 785790  Size: SH
  3. Disconnect the oxygen sensor retainers from the catalytic converter hanger bracket.
  4. Remove the nuts securing the catalytic converters to the catalytic converter hanger bracket.

  5. Object Number: 772371  Size: SH
  6. Remove the bolts securing the catalytic converter hanger bracket to the transmission.
  7. Bend the catalytic converter braces slightly rearward, only enough to clear the hanger bracket studs.
  8. Remove the catalytic converter hanger bracket from the catalytic converters.

Installation Procedure


    Object Number: 772371  Size: SH
  1. Insert the catalytic converter hanger bracket studs through the catalytic converter braces.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the bolts securing the catalytic converter hanger bracket to the transmission.
  4. Tighten
    Tighten the catalytic converter hanger bracket bolts to 50 N·m (37 lb ft).

  5. Install the nuts securing the catalytic converters to the catalytic converter hanger bracket.
  6. Tighten
    Tighten the catalytic converter hanger bracket nuts to 25 N·m (18 lb ft).


    Object Number: 785790  Size: SH
  7. Snap the oxygen sensor retainers into place in the catalytic converter hanger bracket.
  8. Lower the vehicle.