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A bad fuel sending unit, a fault in the circuitry for the fuel sending unit, or possibly a faulty gauge.
Most of the time, the fuel gauge is not the problem. The problem rests with the sending unit in the fuel tank. To fix it, you must replace the sending unit. This is done in different ways depending on the position of the tank in your particular truck.
The sending unit in the fuel tank is defective,, replace it and fix your problem.
Probably not. In most cases the problem is the sending unit inside the fuel tank.
The fuel cap has no effect on the fuel gauge and there is no "reset" for this. More than likely the problem is with fuel sending unit in the tank. A less likely cause is incorrect levels of additives in fuel, this can cause the gauge to flucuate erratically.
The cause of the faulty fuel gauge is probably the fuel gauge sending unit located inside the fuel tank. Replacing the sending unit would require dropping the fuel tank.
It could be a fuse or the fuel sending unit. On that vehicle the fuel sending unit can be accessed by removing the rear seat.
Not that I know of.
Most likely cause would be a defective/stuck fuel sending unit, which is part of the fuel pump assembly. Lift the rear seat for access to the fuel pump. One other possible cause would be a wiring fault between the fuel pump and instrument cluster.
Fuel Sending Unit is bad. It is a common problem in these vans!
PERHAPS THE PROBLEM LIES SOMEPLACE ELSE. IT MAY BE THE GAUGE ITSELF OR A WIRING PROBLEM.
Possible bad ECM.