[Brian R.]

Welcome to the AF!

Make him show you the corroded areas.

Although it will depend on many factors, normally if the lines are corroded, you replace only the fuel lines. If the pump is working, it's working.

If the pump connections are corroded (at the tank), then you will need a new pump. Nothing is permanently joined so that you have to replace more than what is damaged by corrosion.

Start by replacing the corroded line(s) and see if you have a running engine. If you do and no more gas leaks, keep an eye on it and drive it.