Question about 2002 GMC Envoy

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2005 gmc envoy emissions light

The emissions light on my 2005 gmc envoy came on went off and now has been on for about 2 weeks. The truck has 33,000 miles on it. I changed to a higher octane and that didnt help and its not the gas cap.

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Maybe fuel fiter

Posted on Feb 15, 2009

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Check the white ground wire on the plug on the vehicle.

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