I've done a ton of searching on this and haven't had any luck figuring out where this is coming from. I went out to my truck (03 Xtra cab) yesterday for the first time in 2 weeks, got in it, and it smelled a little musty. I checked around and found that the carpet on the passenger side front was completely soaked. I haven't driven it in weeks, so it's not the AC leaking, and all of the windows were up so it's not rain dripping, so I'm thinking it is a gasket somewhere. I pulled the carpet up, turned on the garden hose, and soaked the truck to see if I could tell where it was coming from, no luck, this sucks!!! I saw that there was a TSB for a leaking seal somewhere up front, but I can't get it to leak with the hose, any suggestions to figure out where this water is coming in???