[Cabnchassis]

I'd first try and check for voltage going to the fuel pump to see if it's a wiring issue. The sending unit and fuel pump wiring are pretty close together and since your sending unit is dead and you're getting no fuel it could be a short.

Otherwise you'll have to drop the tank again. If you find that your fuel pump is dead, but your sending unit is ok, I'd still change the sender so you don't have to drop the tank again when it finally does crap out.