[IsuzuKid]

It is your FUEL SENDING UNIT that needs to be replaced. Had the exact same problem with my 99 Rodeo. When I had it fixed, mine was still under warranty. I don't know about now, you might end up having to pay $300 to $400 for the parts and labor. If you don't mind in saying "empty" all the time, you can use your TRIP ODOMETER to calculate how much gas you have left. For example, My rodeo gets about 200 miles per tank. I reset the trip odometer everytime i fill up and its very accurate. When i get close to 200, i fill it up again. HTH