2011 Yukon Xl rear seat rattle

[Summit 700]

I have a 2011 Yukon XL with the second row bench seat. The second row seat has a bad rattle, the passenger side is worse than the drivers side. If someone is sitting on the seat the rattle is gone. Has anyone had this trouble?
Cory

 

[jyi786]

Did it sound anything like this?

http://www.tahoeyukonforum.com/threads/2012-yukon-denali-rattling-with-video.88316/

 

[Summit 700]

Sound is a bit different. I only hear mine when I hit a decent sized bump. When someone sits on the second row seat mine is quiet