Leaking when pumping gas, the line on 2002 Pontiac Montana

How do you fix the line that leads to you gas tank. My is leaking when you pump the gas

Asked by for the 2002 Pontiac Montana
You will need to replace whatever part that is leaking on your Pontiac Montana. The metal part at the top is called the filler neck. A rubber hose connects the filler neck to the fuel tank.