Question about 2000 Pontiac Montana

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Fuel Gauge stuck on full

If I crank my van it says its full but if I leave it running and it is getting low on fuel the light will come on but other wise it doesn't move at all

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Unfortunately friend the sending unit that sends the signal to the fuel gauge is in the gas tank and is a part of the fuel pump. You may get away with checking the wire harness that runs from the gas tank to the frame and see if there are any wires that corrosion may have gotten to, and you could also try running the gas tank for the most part at 3/4 and if it's just a stuck float at the sending unit. It may free it self and start working again, other then that without the replacing the sending unit. Your going to have to keep a track of the amount of fuel you put in your gas tank and how far you drive, till it's time to replace the fuel pump which like i mentioned is apart of the sending unit. Sorry for the bad news. Keep me posted, good luck.

Posted on Jul 23, 2009

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You need a new fuel level sending unit. It is the sensor in the gas tank. There have been several issues with these, and they are primarily caused by bad fuel. I would recommend replacing the fuel level sending unit, then switching fuel brands.

Posted on Jul 23, 2009


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