I have an 07 and no brake problems. I've towed it about 16k miles but have only 13k on the odometer. I wonder if you are getting too much aux braking and are using the toad to help stop the motorhome?
I've seen reports in car magazines that new cars tend to wear out the brakes quicker than a few years ago. Supposedly the newest models freewheel more to help fuel economy, with the result that the brakes get used more heavily in routine stop and go driving. I know my Acadia will coast a heck of a lot further than our previous Tracker. 17k miles, however, is a ridiculously low figure. Does that include the towed miles or is that just what the odometer says?
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL