Question about 2007 GMC Envoy Denali

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2007 GMC Envoy - Gas gauge showing empty and check engine light

On my 2007 GMC Envoy Denali, the last few times that we have filled it up with gas, the gas gauge reads empty and the check engine light comes on. Have tried removing the gas cap and re-inserting it. After we drive it for awhile, everything goes back to normal.

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  • 293 Answers

This is a safety feature that the vehicle brings. You need to reset the E.C.U on dealership or it will keep doing it to you. It was probably caused by one single time that you did not closed the fuel cap correctly. Good luck

Posted on Dec 29, 2009

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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.


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.

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It is most likely your fuel level sending unit has gone bad. It sits inside your fuel tank to tell the fuel guage how much gas you have in the tank.

The sending unit for the gas gauge is in the fuel tank and part of the fuel pump module, it is not sold seperately. Price is around $350.00, 2 hours labor to install the part.


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Feb 18, 2010 | 2006 GMC Envoy

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My gas gauge goes to empty and miles until empty shows "---". This only last a few minutes and returns to normal.


The fuel level sensor is bad and will need to be replaced. The tank will have to come down to replace the sender.

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1 Answer

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Remove the sender wire from the fuel tank and short it to ground (metal part of tank).

If the fuel gauge goes to full then your sender unit is faulty and replace it.If not ,please come back to me .

Please leave positive feedback if you feel I have helped you.

Thank you

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Common problem on the 03-06 Envoy instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Envoy fuel gauge problems

Jun 13, 2009 | 2006 GMC Envoy

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The sending unit in your tank is bad replace it.

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Suspect faulty fuel sender. Fuel sender is attached to fuel pump in tank.

May 23, 2009 | 2007 GMC Envoy Denali

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2006 GMC Envoy XL gas gauge reads empty after filling, then slowly moves up after driving but will continue to lose pressure until it reads empty and the light is on, then the check engine light came...


Sending unit. Its all one unit including fuel pump, float, ect. The check engine light is because of the high or low resistance in the unit. Let me know if you have already fixed.. You have to drop the tank to get to it also.

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1 Answer

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The float that moves the gas hand is possibly stuck in the tank. If there's isn't an access hole in the rear of the vehicle you'll have to drop the tank. Unless it becomes free on it's own. Hope this is helpful. Please rate. Thanks

Sep 28, 2008 | 2007 GMC Envoy Denali

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