I have a 2014 GMC Acadia Denali. My SiriusXM signal is constantly dropping. It always seems to drop in the same areas too. When I drive down to to the Keys (I live in south florida) my signal drops in the same areas. I dont understand because there is nothing blocking the view to the sky. Im practically out in the middle of the ocean surrounded by water. I saw some threads where they blame tmobile and some threads where they say its moisture in the antenna base. Has anyone had any recent experience with this. Even a fix. Do I have to get a new antenna? I wouldnt mind getting the antenna if that was the problem.