Removal Procedure

Important:  The 3-way catalytic converter is serviced by replacing the entire assembly. Always replace the gaskets at the front and rear flanges when servicing the 3-way catalytic converter assembly. Never reinstall the original gasket.

Fig 1: Catalytic Converter Hangers And Gaskets

Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle.
2. Disconnect the heated oxygen sensor (HO2S) wiring harness connector and retainers. Refer to HEATED OXYGEN SENSOR
3. Support the exhaust system.
4. Remove the catalytic converter hangers.
5. Remove the catalytic converter bolts.
6. Remove the catalytic converter gasket.
7. Remove the exhaust manifold pipe stud nuts.
8. Remove the 3-way catalytic converter.
9. Remove the exhaust manifold pipe gasket at the exhaust manifold pipe studs.
10. Remove the heated oxygen sensor (HO2S). Refer to HEATED OXYGEN SENSOR
Fig 2: Heated Oxygen Sensor (HO2S)
Courtesy of GENERAL MOTORS CORP.