Rear Rotor Scoring

[cgspies]

I have a 2002 2500HD Silverado, that I drive on the beach and off road a considerable amount of time. Starting at about 6,000 miles, I noticed that the rear rotors were getting scored. I mentioned this to my dealer and was told there was nothing wrong with them. As I approached the end of my warrenty, at 36,000 miles, the scoring was still prevelant, but not getting much worse. Again, my dealer told there was nothing wrong with them. So, just to be sure, I took some pictures and emailed Chevy customer service. They looked at them, and discussed it with my dealer, and said, it wasn't "normal" wear, but it was not due to any manufacturer defects. Now I have almost 46,000 miles on the original set of brakes, so I am not that upset about this, but seeing how the front rotors are fine, and both of the back ones are all scored/grooved up, I wanted to find out what happened.

After inspecting them, it seems that the rear brake pads have beveled ends, and the fronts don't. I have a feeling that dirt/sand/grit is getting pulled into that bevel as the rotor turns, and is causing this uneven wear of my rotors. Has anyone else noticed this? I wonder if the pads were made without the bevel if this would still be a problem.

Chris

[smcelhe]

My father and I have 99 Silverado's and our rear rotors did the same thing. I just replaced my rear rotors at 60,000 miles. I'm not sure what causes it...The brake pads slide into groves....the pads on both our trucks were really tight in the groves.....so tight that I wonder if they didn't drag all the time. My front pads are still 80% good at 60k....back set was shot at 35k. I filed my new braked pads a little so they could float in the groves....They seem to be working alot better.

Wait to you hear what rotors cost for that truck. GM want $256 a rotor....Advanced Auto was $110.

[dieselman]

You are right the rear must be serviced twice a year to clean the sliders and get all the dirt out. [If you do a lot of off roading] If not at least once a year. The brake pads are not sliding on the slides so thay act as if thay are seized and wear the rotor down. This is easy to fix yourself or have it done it will save on pads&rotors simply take apart and clean under the sliders[sand paper] then the sliders then the pad ends then lubricate with a good brake lub. I mix a little anti seize with mine.