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. Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side.

  2. Object Number: 1973980  Size: SH
  3. Remove the catalytic converter nuts.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  5. Disconnect the oxygen sensor electrical connector.

  6. Object Number: 1224063  Size: SH
  7. Disconnect the muffler pipe from the left and the right side catalytic converters.
  8. Carefully remove the catalytic converter with the seal/heat shield and oxygen sensor from the exhaust manifold.
  9. Remove the oxygen sensor from the catalytic converter. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.

Installation Procedure

  1. Install the oxygen sensor to the catalytic converter. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.
  2. Important: Inspect the catalytic converter seal/heat shield sealing surface. Replace the seal/heat shield if the sealing surface is worn or damaged.


    Object Number: 1973980  Size: SH
  3. Install the catalytic converter to the exhaust manifold.
  4. Partially install the catalytic converter nuts to the exhaust manifold.
  5. Connect the oxygen sensor electrical connector.
  6. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1224063  Size: SH

    Important: Inspect the catalytic converter seals. Replace the seals if they are worn or damaged.

  7. Install the exhaust pipe to the left and the right side catalytic converters.
  8. Tighten
    Tighten the exhaust pipe nuts to 17 N·m (13 lb ft).

  9. Lower the vehicle.
  10. Tighten the catalytic converter to exhaust manifold nuts.
  11. Tighten
    Tighten the catalytic converter nuts to 50 N·m (37 lb ft).

  12. Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side.
  13. Inspect the exhaust system for leaks.