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I have a Buick Regal LS and I had them run a computer diagnosis and it was due to the gas cap not fitting properly. There is an electronic sensor there. Most automotive stores will do this check for you free of charge.

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โˆ™ 2009-10-28 14:29:49
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Q: 1997 Buick regal gs the check engine light is on what could it be?
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