I have a 2007 Ram 1500. Gas will only fill for a few seconds at a time. I've read that this is most likely a check valve problem that does some sort of venting?? Anyways, I've read that this is part of the tank and the whole tank needs replacing. Is this so, or is there a way around this? Are there any other possibilities to eliminate first? Is there a diy on dropping the tank also? I found one but it was for a cummins I think. Thanks