GM Service Manual Online
For 1990-2009 cars only

The exhaust system design varies according to the model designation and the intended use of the vehicle.

In order to secure the exhaust pipe to the exhaust manifold, the exhaust system utilizes a flange and seal joint coupling. A flange and gasket coupling secures the catalytic converter assembly to the muffler assembly.

Hangers suspend the exhaust system from the underbody, allowing some movement of the exhaust system and disallowing the transfer of noise and vibration into the vehicle.

Heat shields protect the vehicle from the high temperatures generated by the exhaust system.

Notice: The three-way catalytic converter requires the use of unleaded fuel only. Using leaded fuel will damage the converter and other emission system components.

The catalytic converter, an emission control device, attaches to the engine exhaust system in order to reduce hydrocarbon, carbon monoxide, and nitrogen oxide emissions from the exhaust gas. The catalytic converter and the exhaust manifold pipe are an assembly. The catalyst, in the catalytic converter, is not serviceable.