GM Service Manual Online
For 1990-2009 cars only

Object Number: 42989  Size: SH

Notice: The catalytic converters require the use of unleaded fuel only. Using leaded fuel will damage the catalytic converters and other emission system components.

The catalytic converter is an emission-control device. The catalytic converter is added to the gasoline engine exhaust system in order to reduce the following:

    • Hydrocarbons
    • Carbon monoxide
    • Nitrogen oxide pollutants from the exhaust gas

The gasoline engines in these vehicles use either an oxidation catalytic converter that does not contain rhodium or a three-way catalytic converter that uses rhodium. The catalyst in the converter is not serviceable.