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Check the fuel cap for tightness. If that dosent work take it to the dealer The fuel cap itself could not be creating the seal that there needs to be. Before taking it to a dealer, buy a new gas cap at an auto store and see if that works. Spending $10.00 as to compared to $40.00 might work better. The check fuel cap can also mean there is a major leak in you Evaporative emissions system.....a hose off or a clamp broken or missing If you find any hoses hanging from a place they obviously came from, reconnect them, secure them with a hose clamp and have the code cleared by autozone or someplace that checks your check engine light for free.

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โˆ™ 2007-04-28 13:00:12
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Q: What would cause a 2004 Chevy Tahoe to display 'tighten fuel cap'?
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