Did a search and didn't find anything on the newer models having this issue.
I noticed it today while driving through my work parking garage. My window was down and I noticed a rattle coming from the rear when I went over the speed bumps. Sounded like it could be the calipers, but not really sure. I've only had it for a month and it's the first truck I've owned with rear calipers.

Is this normal or should I have the dealer check it out?

Thanks,
Tom

 

my 2011 has a funky dampener on the rear calipers its weird but oh well maybe thats why its one there