GM Service Manual Online
For 1990-2009 cars only

Intermediate Pipe 2.2L

Removal Procedure

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

  3. Object Number: 25822  Size: SH
  4. Cut the intermediate pipe at the muffler.

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

  7. Object Number: 25293  Size: SH
  8. Remove the intermediate pipe from the hanger.
  9. Remove the intermediate pipe.

  10. Object Number: 25540  Size: SH
  11. Remove the muffler from the hanger.

  12. Object Number: 25271  Size: SH
  13. Remove the three way catalytic converter seal.
  14. Clean the flange surface.

Installation Procedure


    Object Number: 25271  Size: SH
  1. Install the three way catalytic converter seal.

  2. Object Number: 25293  Size: SH
  3. Install the intermediate pipe to the hanger.

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

  6. Object Number: 25540  Size: SH
  7. Install the muffler to the hanger.

  8. Object Number: 25822  Size: SH
  9. Weld the muffler to the intermediate pipe.
  10. Lower the vehicle.

Intermediate Pipe 3.1L

Removal Procedure

    Important: A service muffler will be needed when replacing the intermediate pipe on an originally equipped, welded system.

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

  3. Object Number: 25822  Size: SH
  4. Cut the intermediate pipe at the muffler.

  5. Object Number: 25271  Size: SH
  6. For the 3.1L engine with a single exhaust, remove the intermediate pipe from the three way catalytic converter.

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

  9. Object Number: 25293  Size: SH
  10. Remove the intermediate pipe from the hanger.
  11. Remove the intermediate pipe.

  12. Object Number: 25540  Size: SH
  13. Remove the muffler from the hangers.

  14. Object Number: 25271  Size: SH
  15. For the 3.1L engine with a single exhaust, remove the three way catalytic converter seal.

  16. Object Number: 25505  Size: SH
  17. For the 3.1L engine with a dual exhaust, remove the three way catalytic converter seal.
  18. Clean the flange surface.

Installation Procedure


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

  2. Object Number: 25505  Size: SH
  3. For the 3.1L engine with a dual exhaust, install the three way catalytic converter seal.

  4. Object Number: 25293  Size: SH
  5. Install the intermediate pipe to the hanger.

  6. Object Number: 25271  Size: SH
  7. For the 3.1L engine with a single exhaust, install the intermediate pipe to the three way catalytic converter.

  8. Object Number: 25505  Size: SH
  9. For the 3.1L engine with a dual exhaust, install the intermediate pipe to the three way catalytic converter.

  10. Object Number: 25540  Size: SH
  11. Install the muffler to the hangers.

  12. Object Number: 25822  Size: SH
  13. Weld the muffler to the intermediate pipe.
  14. Lower the vehicle.