Hello all I had to replace the elec. fuel pump on my 04 Trailblazer when dropping the tank put a hole in it cutting the rusted out strap bolts I bought a used tank , a new filler neck and fuel pump. After that I cannot put gas in the tank the pump shuts off immediately no mater how slow I pump. I can fill a 5gal gas can and it goes in as fast as I can pour using a funnel so there is no restriction there it is a vent issue so I bought a new tank vent that attaches on side of tank no change. I did wash out the tank with soap and water and rolled it around upside down and all could that have messed up one of the other sensors on top of the tank there are 2 or 3 small round sensors on top of the tank that I don't know what they are. I will attach picture of vent valve I changed. Any suggestion would be appriciated. Thanks for reading