GM Service Manual Online
For 1990-2009 cars only

This information is supplemental to the gasoline service manual information. Refer to the gasoline service manual for additional information.

Listed below is a check that should be performed at EACH fuel fill to help ensure the safety, dependability, and emission performance of the vehicle.

Fill Valve O-Ring

Important: Always perform this check prior to each fuel fill.

Inspect the condition of the fill valve O-ring. Replace the O-ring if it is damaged or missing.