In actuality, it may very possibly not be your gauge at all. There is a very good likely hood it is really the sending unit in your fuel tank. The sending unit in the tank acts like a resistor that allow more or less current to pass based on the fuel in the tank that is measured by a float attached to the sending unit. I have had very few occasions when the gauge itself was bad. More often than not I have found the problem to be the sending unit in the fuel tank. Replacing the sending unit (if necessary) is not an extremely difficult task, it just takes some time.