Removal Procedure

Replace the entire converter assembly in order to properly service the 3-way catalytic converter.

1. Raise and suitably support the vehicle. Refer to JACKING AND LIFTING in General Information.
2. Disconnect the Heated Oxygen Sensor connector Refer to ENGINE CONTROLS - REMOVAL & INSTALLATION & OVERHAUL  in Removal and Installation in Engine Performance.
3. Remove the exhaust manifold pipe nuts from the exhaust manifold pipe studs.
   Fig 1: Removing Exhaust Manifold Pipe Nuts From Exhaust Manifold Pipe Studs

   Courtesy of GENERAL MOTORS CORP.
4. Remove the catalytic converter nuts from the exhaust pipe.
5. Remove the 3-way catalytic converter.
   Fig 2: Removing 3-Way Catalytic Converter

   Courtesy of GENERAL MOTORS CORP.