This is a great thread. Thanks for taking the time to post this. Really cool to watch the evolution of your truck. Plus, you sharing some great Ideas. I now have Falken AT3W on my truck and love them. Also, think I will go will husky liners next BTW, your truck looks great!
This might sound odd. I had something similar happen to my 08 Envoy. Luckily it was still under warranty. I never fully understood the explanation, but they told me a tube that channels water to the outside of the car had become kinked. In my case the source of the water came from the glove box area. (I am almost certain it had not come from the headliner) As a result, water was backing up in to the passenger compartment. I had a much larger water spot and it was more inboard; away from the sill plate. I am not even sure if our trucks have the same 'plumbing'
As mentioned, I am down on them. However, I have to believe they have to be 'safe' as it relates to DOT regulations. I am shocked this never came up when they were testing this with focus groups. I thought all new vehicles were tested with focus groups. I have got to believe they will be improved soon. I guess us 'early adapters' will be stuck with what we have. Or go aftermarket.