I just bought a 98 silverado z71, got it home and had to replace fuel lines, I pulled the tank and replaced everything but the filler hose and the tank.. Tank was in great shape. When i put the tank back in I have a leak when filling. Everything is tight and straight. Do i need a new filler hose or is there a gasket or advesive I am missing? didn't notice anything when I tore it apart.