Question about 2007 GMC Envoy Denali

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My check engine light is stuck on and my fuel gauge shows empty when it is full. how can i fix this myself? I want to sell.

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You need to get the codes for the check engine light, but the full gage issue this is most likely the sending unit in the gas tank.

Posted on Mar 19, 2011

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Fuel gauge full when not full. only one quarter a tank nearly full could only get 3 gallon in full could not get anymore in 160 miles fuel light came on and Gage showed empty. nigel from Burnley


probably stuck or damaged fuel sender in the tank.. you could try banging the bottom of the fuel tank to un stick it but if that dont work it will need to be replaced .

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could be stuck or the sender unit has failed and most likely cause is the float has filled with petrol but without a removal of the sender unit and an inspection its only speculation

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