Your fuel line inlet (pick-up tube) is plugged inside the tank. Pull the hose off of the pump and blow air back into the tank to clear it. Then inspect your tank to see how bad it is inside. Then probably order a new one. But I'm only guessing here. Let us know,
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!