My 2012 has the rear breather running up to under the tub. Would imagine the 2011 would be the same. Just poke your head under and have a look. I was gonna move it higher but after an incident a few weeks ago where the cab filled with water/mud and not an ounce in the diff don'tthink iI'll bother.
Front diff should be a silver tube in a "u" shape just near air box. The g'box and transfer should be silver tube again in "u" shape somewhere near drivers side firewall.