Originally Posted by big swede
Sweet! I think you nailed it and you're now good to go.
Rain all day today was the ultimate test, and no water inside...I think you're right Big Swede!
Thanks to everyone that posted suggestions on how to fix it.
One year + one month since the fix, and no issues with water in the Buick, even after torrential rains and a hurricane that hit us this past summer/fall.