How to fix a bad gas gage 0n 2006 ford f100?

How to fix a bad gas gage 0n 2006 ford f100? - 1

First find the reason for it not working or working properly - Could be the sender in the fuel tank, could be wiring, could be the gauge itself

Hi it most likely needs a new voltage regulator which is a simple device. However being secured on the back of the gauge it is the most difficult place to reach it.

It is called troubleshooting.

Trick question, there's no such thing as a 2006 Ford F-100.