Removal Procedure
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
- Raise the vehicle.
- Remove the transmission support. Refer to TRANSMISSION SUPPORT .
- Disconnect the oxygen sensors (O2S) and heated oxygen sensor (HO2S) electrical connections from the wiring harness.
Courtesy of GENERAL MOTORS CORP.
WARNING: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.WARNING: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.Important: If equipped with dual catalytic converter pipes, and removing only the right catalytic converter, the left catalytic converter does not require removal. If removing the left catalytic converter both catalytic converters require removal.
- Remove the nuts and the seals retaining the catalytic converter pipes to the exhaust manifolds.
- If equipped with single catalytic converter pipe, remove the nuts retaining the catalytic pipe to the muffler. Depending on the vehicle configuration the flange may be a 2 bolt or 3 bolt flange.
- Remove the catalytic converter pipe flange gasket.
- Remove the catalytic converter pipe from the vehicle.
- If equipped with 2 catalytic converter pipes, loosen the clamp securing the right catalytic converter at the front of the muffler.
- Remove the right catalytic converter pipe from the muffler and the vehicle.
- Remove the left catalytic converter pipe retaining nuts and gasket from the muffler flange connection.
- Remove the left catalytic converter pipe from the vehicle.
- If replacing the catalytic converter, remove the oxygen sensors as necessary. Refer to OXYGEN SENSOR .