I have a 2013 Volvo VNL day cab truck. When I drive in the wind/crosswind I get a nasty vibration, it seems to be coming from the top of the windshield area outside, like the sunvisor area. Has anyone had this issue and is there a fix for it. we have looked around and haven't found anything really loose, we tightened a couple screws a quarter turn, but that was it. This problem started around 25,000 miles. I am open to any ideas that could cause this, and it might not be the outside sun visor causing it, it is just coming from that area. Thanks