It has taken me months to finally figure out my rattle so I thought I would post to possibly help others. No amount of forum and google searching could ever find out the problem. My rattle was clearly coming from the rear of my 2013 sho, but only on the highway at speeds above 65. It was a consistent annoying rattle.
After much trial and error I discovered the source is actually outside the car! The little navigation antennae on top of the car must have been catching wind at highway speeds and rattling against the roof, because I secured it and the rattle is GONE! Hope it helps someone in the future. I hate rattles! Lol
