Finally finished installing new tank, sender and in-tank pump for my 7747 setup. Previously I had an external pump. On the first try, I listened really closely as I turned the key, thinking I'd barely be able to hear the pump, but it's actually very loud. It's like it's resonating against sheet metal or something. This is for a K5 Blazer with no carpet or sound deadening of any kind. The engine runs fine. Should I be worried? I did notice the filler neck on the tank contacts the body, which could be part of it.