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. Ignition OFF
  2. Caution: Refer to Battery Disconnect Caution in the Preface section.

  3. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  4. Remove the intake manifold sight shield. Refer to Intake Manifold Sight Shield Replacement.
  5. Remove the right pre-catalytic convertor heated oxygen sensor (HO2S) sensor. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1.
  6. Remove the right exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Right Side.

  7. Object Number: 2041477  Size: SH

    Important: The right catalytic converter to exhaust manifold retaining nuts (3) are single use parts. They must be discarded after removal.

  8. Remove the right catalytic converter to exhaust manifold retaining nuts (3).
  9. Discard the nuts.

    Caution: Refer to Vehicle Lifting Caution in the Preface section.

  10. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

  11. Object Number: 2053082  Size: SH

    Important: The exhaust crossover pipe assembly to right catalytic converter retaining nuts (3) are single use parts. They must be discarded after removal.

  12. Remove the exhaust crossover pipe assembly to right catalytic converter retaining nuts (3).
  13. Discard the nuts.

  14. Pull down and back on the right catalytic converter (1) to disconnect from the exhaust manifold.
  15. Disconnect the exhaust crossover pipe assembly (2) from the right catalytic converter (1).

  16. Object Number: 2053083  Size: SH
  17. Remove the right catalytic converter (1) from the vehicle.

Installation Procedure

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

    Caution: Refer to Vehicle Lifting Caution in the Preface section.


    Object Number: 2053083  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Install the right catalytic converter (1) to the vehicle.

  3. Object Number: 2053082  Size: SH
  4. Align the exhaust crossover pipe assembly (2) to the right catalytic converter (1).
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Install NEW exhaust crossover pipe assembly to right catalytic converter retaining nuts (3).
  7. Tighten
    Tighten the nuts to 40 N·m (30 lb ft).

  8. Lower the vehicle.

  9. Object Number: 2041477  Size: SH
  10. Install NEW right catalytic converter to exhaust manifold retaining nuts (1)
  11. Tighten
    Tighten the nuts to 45 N·m (33 lb ft).

  12. Make sure that the exhaust system is clear of all other components and chassis. If the exhaust system is not clear of all the other components loosen all retaining nuts and re-align. Refer to Exhaust System Alignment.
  13. Install the right exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Right Side.
  14. Install the right pre-catalytic convertor HO2S sensor. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1.
  15. Install the intake manifold sight shield. Refer to Intake Manifold Sight Shield Replacement.
  16. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.