I have a really crappy video :). I ended up narrowing this down by standing on my seat with my head out the sunroof and banging on the roof in front of the sunroof until I hear the rattle. Mine was in the passenger corner between sunroof and windshield. From there, I pulled down the...
After many hours of searching, I found a loose 13mm bolt above the headliner. The washer was loose and rattling against the roof! Tightened it up and it's quiet in the cab now.
I have had my '21 F-150 for 2 weeks now am hearing a rattle coming from the passenger seat when I hit a bump. I have seen other posts on here about cabin rattles and have ripped my truck apart trying to narrow it down and I think there is something loose inside the seat. A Google search shows...