Gas gauge frozen...??urgent?

so why have you not used the odometer? all you do is pick a number like 54000 drive two hundred miles and fill it up at 54200 ? no strain, no brain simple works perfect every time, and pretty soon you will be filling the tank every 200 miles, and if you go over a little by accident,your fine, you know you have gas. The problem is likely the sending unit in the gas tank. In order to replace it, you must drop the tank. you can find a shop repair manual for the vehicle and test the guage to see if it works, but its most likely the problem is in the tank.