Fuel gauge don't work... HELP
Well every since I have owned my truck the fuel gauge has not worked, the truck is the 06 6.0 in my sig. Now that summer is coming up I will be taking it on some trips and really need to get this fixed, whatching my trip meter I have to stop quite often on trips to make sure I don't run low on diesel. Right now I have tried a new sending unit and that did not fix it. The fuel gauge is throwing a check engine light, so that tells me I don't think it is the gauge. The gauge will come up to the Empty mark when you turn the key on then falls back down to the bottom of the gauge. This truck has had an auxilary fuel tank in it before I bought it so I am not sure if that has anything to do with it or not. Any help would be appreciated.