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Q: instrument gages going bezerk on occasions on 2002 GMC Envoy

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Hello, I have 167000 miles overall excellent suv. My instruments go crazy every other day. that is all the gauges, except speedometer. also, i have excessive vapor build up in the gas tank, very hard to fill up gas without tripping the pump. other than that the best trouble free vehicle ever.
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This is a common problem with the instrument panel gauges, and I believe the warranty on them has been extended because they were so problematic. Check with your GM Dealer and see if it applies to your Envoy. You can see some info here about the instrument panel issues:
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