Exhaust buzz 6.2 Denali

[Bucky1]

11' 6.2 Denali. Right at 3100 rpm and for a couple hun over that, it buzzes. Almost like someone with a real nazely voice. Didn't see anything loose. Anyone have this and a fix?

 

[Doubeleive]

I would suggest taking it by a muffler shop those guys are pretty good at finding whatever may be causing the problem since they deal with it often. just my 2 cents.