Hey everyone, So a while back I got a message "tighten gas cap", then a couple weeks later my CEL came on. I ran the code and got P0446. As of last week when fueling gas the pump kept turning off every 20 seconds when I wasn't close to full. The pumps at that station have always been touchy so I usually back the pump out 1/4" and it's fine, but not this time. The gas started to back up and overflow a small amount before I noticed. Today I went to a different station and had the same exact problem with the pump stopping and the gas wanting to back up and overflow. I was able to stop it and let it settle, then pump more, then wait. This leads me to believe that there is something wrong inside of the pipe going from the gas cap to the tank. I am not to mechanically savvy, so I really need some help in finding the problem. The truck is out of warranty. Money is tight and I am good with tools, so doing the labor myself is fine. Any suggestions on where to start would be great. Thanks in advance, you guys are the best.