So I was on my way to work this morning and I was sitting in traffic when I noticed that I was getting a quick high pitched noise at what seemed to be the same point in each rotation of the tire. My last pickup was a GMC and the wear indicator on the front pads created a very similar sound at a certain point in the wheel/tire rotation. However, the pads and rotors up front are about 3,000 miles old so I was wondering if the shoes had a wear indicator. I have never come across a wear indicator on shoes in the past but...... It's a 2006 1500 LT Extended Cab 4x4 w/ the 5.3L. It has about 70,000 and I havent changed the shoes yet. How many miles are you guys getting out of your rear shoes? Any ideas on what I am hearing? Thanks!