Question about 2006 GMC Envoy Xl

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The gas gauge keeps moving back and forth what could be wrong

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FAULT IN THE FUEL LEVEL SENDIND UNIT OR LOOSE WIRE.

Posted on Sep 14, 2010

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Good Evening, it is an unfortunate sight to see the gas gauge move on its own without putting gas in the car to make it move. Unfortunately this is to be expected more with gm cars and trucks more than any other vehicle. The fuel level sending unit (attatched to the fuel pump assembly) is a removeable part and is only available through your local gm garage (dealer). Hope this helps.
Thanks,
Joey

Posted on Sep 14, 2010

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  • GMC Master
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Fault in the vaiable potentiometer fitted in the tank for the sensing the level of the fuel. This can be worned out over a period of time and loses contact at some points.
So open check or replace.

Posted on Sep 14, 2010

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Posted on Jan 02, 2017

  • 958 Answers

SOURCE: fuel gauge moves back and forth from full to empty

you have a bad sending unit inside your tank.
the resistance of the potentiometer inside is broke on the half tank part.

you have to replace it.

tnx 4 using fixya.

drcool

Posted on Oct 05, 2008

louislevel_2
  • 374 Answers

SOURCE: Gas gauge is moving back and forth.

hello! there, fuel gauge not accurately reading or registering your actual fuel,this can spend costly so much on refueling of gas due to worries on drying of tank.there are factor to check on fuel sensor this maybe malfunction,or check the fuel lever sensor this was located on your fuel tank,This should be done on car service center
not by yourself this is due to hard work besides fuel is flammable in small spark of igniton by a certain object.be sure to take all necessasry precaution on doing this.so its beteer qualified mechanic to this.thanks and regads..

Posted on Mar 28, 2009

  • 811 Answers

SOURCE: My gas gauge suddenly starts clicking and moving

check fuel pump relay or fuel pump, run scanner for trouble codes, some auto parts stores do this for free

Posted on Oct 03, 2009

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you have a bad sending unit inside your tank.
the resistance of the potentiometer inside is broke on the half tank part.

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tnx 4 using fixya.

drcool

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