Question about 2004 GMC Envoy

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I have a 2006 envoy and the fuel light is indicating that my tank is empty and it's full. How do I fix it?

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This is controlled by the fuel pump/level module in the tank. The fuel tank needs to be dropped and the module replace. This is the only thing that will trigger that light is the level indicator in the tank. The module runs about $350 just so this doesn't suprise you. Let me know if you need anything else like instructions or diagrams.

Posted on Jul 22, 2010

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2 Answers

I have a 2003 GMC Envoy and my gas gauge has been flowing up and down to empty and full recently it has stayed on empty. How do I fix it?


Ensure that all of the wire connections are clean, secure and corrosion-free.

  • 2 Check your fuel gauge fuse if the gauge's indicator stays on empty when your turn on the ignition. If the fuse is good, join the sending unit connector to ground. Replace the sending unit if the gauge indictor moves to the full line.
  • 3 Ground the terminal located on the back of the fuel gauge with a jumper wire if the indicator doesn't move. If it does move, consider replacing the wire between the fuel gauge and the sending unit. A poor ground is frequently responsible for fuel gauge problems.
  • 4 Release the wire that connects to the fuel tank's sending unit. Confirm that there's no worn insulation that would permit wire contact to the body or frame. A fuel gauge reading of full generally indicates a problem with the tank unit, not the wiring.
  • Oct 18, 2011 | 2003 GMC Envoy

    1 Answer

    I have a 2006 GMC Envoy the gas needle was located just above the red mark to indicate it is empty but the fuel light was not on. I filled my tank, when I started the engine the needle went below the red...


    Either you have a bad fuel level sending unit or the stepper motor that drives the fuel gauge is bad. A high end scan tool will be required to determine if it is the sending unit.

    Aug 13, 2011 | 2006 GMC Envoy

    1 Answer

    2006 gauge reads empty after filling and the light stays


    sounds like the floater in the tank is stuck dump some fuel injector cleaner in the tank and bounce car little bit to unstick it should fix it

    Sep 14, 2010 | 2006 GMC Envoy

    1 Answer

    2006 GMC Envoy XL gas gauge reads empty after filling continues reads empty and the light is on then the check engine light came on what can be the problem how ca i fixe it to save mesome $$$


    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

    2 Answers

    Even with a full tank my 2005 Envoy XUV fuel light stays on and fuel gauge marks empty


    u need to change this gauge or try to dissasseble and clean it very well then try to install it back again

    Jun 06, 2009 | 2005 GMC Envoy Xl

    1 Answer

    Fuel gage goes to zero and then to full while driving


    Sounds like the sending unit is bad, which is in the gas tank.

    Mar 15, 2009 | 2006 GMC Envoy

    2 Answers

    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.

    Feb 24, 2009 | 2005 GMC Envoy Xl

    2 Answers

    Gas gauge not woking properly gas tank only accepts a little gas


    a fuel sending unit seems to be the most popular solution. the part is about $40. I think the labor is what's going to kill you.

    Nov 21, 2008 | 2006 GMC Envoy

    1 Answer

    2006 GMC Envoy XL gas guage


    most likely a fuel sending unit problem in the tank. could also be problem in dash but sending unit is first suspect

    Nov 16, 2008 | 2006 GMC Envoy

    8 Answers

    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 on.


    The sulfur content in the fuel is contaminating the contacts of the sending unit.

    Some people have had good luck with some fuel system cleaners solving this problem. The cheap stuff doesn't seem to do the job.

    Not that GM isn't completely exonerated from fault but the gas stations don't do a very good job of watching what the stations sell.

    Sep 03, 2008 | 2006 GMC Envoy

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