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Gas gauge indicate empty when full - 2003 GMC Savana

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Check the fuses and relay......these are the most common problems


1. Defective Dash Voltage regulator (Voltage limiter) or gauge
"make sure the gauge is actually receiving current"
2. Lost of a ground at the sending unit
"make sure it is grounded"
3. Break in the wire going to the dash
"chek it"
4. On some Chryslers, the Bulkhead connector on the firewall or connector behind kick panel.
Less Common
1. Actual bad Sending Unit
"it could be the filter"
2. Fuel Gauge defective
"in some causes, nothing is perfect, or premature wear or just ussual wear"

Posted on May 13, 2009

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Posted on Jan 02, 2017

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Installed fuel pump and sending unit on 94 park avenue now fuel gauge doesn't work it was fine with old unit. Now it reads empty


Buick gas tanks are shaped so when full they take a while before the gauge comes off full. After 1/2 then the gauge will move towards empty quicker. When on an incline it will show more gas than is actually in the tank, so when you're cornering, it's reading will be indicating the moving level. I wouldn't worry about it

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Fuel indication does not work


Look for the obvious first - is there a fuse on that gauge ? Is the wiring ok between the gauge and the sender? Is the sender working at all - the latter is nothing more than a variable resistor connected to an arm with a float. Find out what the reading should be for the gauge with a full tank. If you measure and it is no where near that then the gauge itself is at fault.

Sep 07, 2015 | 2012 Ford E-350 Super Duty XLT

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Gas gauge indicator goes to empty when full


sounds like you may have a bad fuel level sender problem. as for the check engine light coming on and storing a fault code that is a separate issue.

Aug 29, 2014 | 2005 Chevrolet Malibu

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1989 silverado gas gauge shows full even when cluster removed from dash.


The sending unit in the tank provides a ground to the gauge depending on the float level. The gauge can "rest" anywhere if the power and ground circuits are not connected.
You would need to know if the gauge has power and is getting a ground signal from the tank.

Jun 02, 2013 | Chevrolet Cars & Trucks

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The gas gauge for the front tank on my 1992 F150 is stuck past full


You probably have a ground wire not making contact to ground on the front tank sending unit. OR the sending unit itself inside the tank is faulty. Either way, when a gas guage goes to full all the time (empty or full), this indicates that NO ground is available for the sending unit.

Apr 02, 2013 | 1992 Ford F150 SuperCab

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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

    The gas gauge says full when you start the engine and the electric range says 446 miles to empty then it will all drop to empty and the gas light will come on, so i never know for sure how much gas I have.


    Sending unit gas gauge in the gas tank has gone bad and will need to be replaced. The gas gauge wire is grounding out causing you to have full full indicated and when there is no ground you get empty signal.

    This is caused by the gauge in the tank having a bad spot on the float, which is common from wear and tear. Also if your lucky, it may just be the wire harness from the gas tank to the frame might be the issue and will need to be replaced. It worst, it's going to be the sending unit it self.

    Thank you for using fixya and good luck

    Oct 11, 2010 | 1999 Oldsmobile Silhouette

    1 Answer

    Fuel Gauge


    replace the sending unit it will leave you stuck when not ready for it please carry small can of gas until replaced sending unit good luck

    Jun 28, 2008 | 2000 Chevrolet Venture

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