I went to a goodyear service center to get my front brakes looked at and they also took a look at the rear ones and mentioned something about a rear wheel outer seal leaking...or something to that affect. I was wondering if that is covered under the powertrain warranty at all. They also mentioned that it would require a "rear brake overhaul" and a brake system flush. My Silverado has just under 51k miles on it and find it odd for any seals to fail that soon. Thanks for the help