Question about 2003 Chevrolet Suburban 1500

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Tighten Gas Cap Error Message

I continue to get a ''tighten gas cap'' indicator when I have a tight gas cap (and check ingine light on).  I had thought perhaps it was a faulty gas cap itself, so I bought a new one, but that had not fixed it (and I had reset the truck's check engine light, and it wound up coming back).  Other symptoms I have are that I can't seem to fill up my gas tank, I can generally only get to 3/4 tank on a regular fill, and if I'm REALLY slow, I can get to 7/8.
Any suggestions?
Thanks, Chris

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Seems that your vent hose on the tank is plugged so the tank is over pressurrizing sending the error code and not allowing you to fill it all the way unclog the vent tube and this will solve the problem

Posted on Apr 18, 2009

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Posted on Jan 02, 2017

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Check the gas cap to see if its tight and that it clicks when you turn it. make sure you turn until it clicks. this will ensure a secure fit.

Now, if you have just recently bought a new replacement cap, it may be the wrong fit and i would recommend purchasing the original replica form the dealership to ensure a tight fit.

Please rate and god bless:)

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