I took my truck into the dealer for an oil change yesterday. The brakes were starting to squeek a little, so I had him check them. The service advisor said that he would recommend replacing pads on both front and rear. The truck has 52,000 miles on it. I use it to tow, but also have an exhaust brake. I must say I expected to get more miles on this set of brakes. How long are you guys going on your first set of brakes?