GM Service Manual Online
For 1990-2009 cars only

Catalytic Converter Replacement 2.4L

Removal Procedure

  1. Raise the vehicle.
  2. Support the three way catalytic converter.

  3. Object Number: 25271  Size: SH
  4. Remove the intermediate pipe from the three way catalytic converter.

  5. Object Number: 25280  Size: SH
  6. Remove the exhaust manifold pipe assembly from the exhaust manifold.
  7. Remove the exhaust manifold seal and the three way catalytic converter seal.
  8. Clean the flange surfaces.

Installation Procedure


    Object Number: 25280  Size: SH
  1. Install the exhaust manifold seal and the three way catalytic converter seal.
  2. Install the exhaust manifold pipe assembly to the exhaust manifold.

  3. Object Number: 25271  Size: SH
  4. Install the intermediate pipe to the three way catalytic converter.
  5. Lower the vehicle.

Catalytic Converter Replacement 3.1L

Removal Procedure

  1. Raise the vehicle.
  2. Support the three way catalytic converter.

  3. Object Number: 25271  Size: SH
  4. For the 3.1L engine exhaust, remove the intermediate pipe from the three way catalytic converter.

  5. Object Number: 25505  Size: SH
  6. For the 3.1L engine with a dual exhaust, remove the intermediate pipe from the three way catalytic converter.

  7. Object Number: 25523  Size: SH
  8. Remove the exhaust manifold pipe assembly from the exhaust manifold.
  9. Remove the exhaust manifold seal and the three way catalytic converter seal.
  10. Clean the flange surfaces.

  11. Object Number: 25536  Size: SH
  12. For the 3.1L engine with a dual exhaust, remove the exhaust manifold pipe assembly from the exhaust manifold.

Installation Procedure


    Object Number: 25523  Size: SH
  1. For the 3.1L engine with a single exhaust, install the exhaust manifold seal and the three way catalytic converter seal.

  2. Object Number: 25536  Size: SH
  3. For the 3.1L engine with a dual exhaust, install the exhaust manifold seal and the three way catalytic converter seal.

  4. Object Number: 25271  Size: SH
  5. For the 3.1L engine with a single exhaust, install the three way catalytic converter.

  6. Object Number: 25505  Size: SH
  7. For the 3.1L engine with a dual exhaust, install the three way catalytic converter.
  8. Lower the vehicle.