Water leak in 2000 Yukon

I have a 2000 GMC Yukon 5.3L, which I just bought. The car came from the desert in Arizona, so the prior owner (father-in-law) probably never knew about it. Now it’s back east and leaks when it rains. It doesn’t have to be moving to leak… not splashing up from underneath. The leak doesn’t appear to be from the windshield. It’s getting in somewhere on the driver’s side behind the front wheel well. It has soaked the carpeting and when I first discovered it, the carpeting was under water. Does anyone know if there were any known problems with this year/model? Anyone have a similar problem with a thought of where this could be originating?

Thanks!

Hi, this still could windshield, may be the ventilation?
Take care, Eggert :bananasmi