GM Service Manual Online
For 1990-2009 cars only

Catalytic Converter Replacement - Right Side V6

Removal Procedure

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

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

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

  2. Object Number: 1221193  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 exhaust pipe from the left and right side catalytic converters.
  8. 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 1 Sensor 1.

Installation Procedure

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


    Object Number: 1221193  Size: SH
  3. Install the catalytic converter to the exhaust manifold.
  4. Partially install the catalytic converter to exhaust manifold nuts.
  5. Connect the oxygen sensor electrical connector.
  6. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1224063  Size: SH

    Note: Inspect the catalytic converter seal. Replace the seal if it is worn or damaged.

  7. Install the exhaust pipes and nuts to the left and right side catalytic converters and tighten to 17 N·m (13 lb ft).
  8. Lower the vehicle.
  9. Tighten the catalytic converter nuts to 50 N·m (37 lb ft).
  10. Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Right Side.
  11. Inspect the exhaust system for leaks.

Catalytic Converter Replacement - Right Side V8

Removal Procedure

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

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


    Object Number: 772383  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Support the exhaust with a suitable screw jack.

  3. Object Number: 1455617  Size: SH
  4. Disconnect the exhaust system from the left and right side catalytic converters. Refer to Exhaust System Replacement.
  5. Using the screw jack, lower the exhaust system.
  6. Disconnect the oxygen sensor electrical connectors.
  7. Remove the right bank catalytic converter to exhaust manifold nuts.
  8. Carefully remove the catalytic converter with the gasket (1) and oxygen sensors from the exhaust manifold.
  9. Remove the oxygen sensors from the catalytic converter. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2.

Installation Procedure

  1. Install the oxygen sensors to the catalytic converter. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2.
  2. Install the catalytic converter gasket (1) to the catalytic converter.

  3. Object Number: 1455617  Size: SH
  4. Carefully install the catalytic converter to the exhaust manifold.
  5. Caution: Refer to Fastener Caution in the Preface section.

  6. Install the catalytic converter nuts and tighten to 50 N·m (37 lb ft).
  7. Tighten the catalytic converter to exhaust manifold nuts.
  8. Connect the oxygen sensor electrical connectors.
  9. Using the screw jack, raise the exhaust system.
  10. Connect the exhaust system to the left and right side catalytic converters. Refer to Exhaust System Replacement.

  11. Object Number: 772383  Size: SH
  12. Remove the screw jack.
  13. Lower the vehicle.