At Each Fuel Fill

Listed below are owner checks that should be performed at each fuel fill to ensure the safety and dependability of your CNG vehicle.

Fill Valve Cap Check

Inspect the fill valve cap. Replace if missing or damaged.

Fill Valve O-Ring Check

Check the condition of the fill valve O-ring. Make sure the O-ring is seated in the groove. Replace if missing or damaged.

You will find three spare O-rings in the glove box. These special O-rings are designed for use with natural gas. See an authorized GM dealer if you need additional O-rings.

To replace the fill valve O-ring do the following:

1. Carefully remove the O-ring from the groove in the fill valve. You can use a small flat-blade or pointed tool.
2. Make sure the groove is clean and free of dirt and debris.
3. Install the new O-ring in the groove in the fill valve. Make sure the O-ring is properly seated in the groove.