Malfunction Fuel Gauge

The fuel gauge on the dash no longer reads correctly. The needle always reads full and never moves. I'm not sure where I need to look to fix this?

Thx

Well either your fuel sending unit is bad, or you need to drop the tank and clean the metal contacts on where it plugs in. if they get corroded, they will not convey the proper voltage/resistance, and it will always read full. Its not a difficult procedure, just time consuming because you have to drop the gas tank.