I havent dropped the tank yet to see exactly what is causing my problem... but every time I fill the tank if I'm not careful it will just over flow out the top of the tank somewhere. I havent dropped the tank yet and am just really carefull when I fill the car up because I am wanting to switch to the plastic tank. The purpose of this thread isnt to find the issue with the steel tank.. but to find out if a tank from a monte carlo of the same year or close to it will fit. I know a lot of other parts are interchangable so I wasnt sure if the tank was as well.