One problem related to brake disc pads has been reported for the 2009 Chevrolet Silverado. The most recently reported issues are listed below.
Used the vehicle for vacation in 2011 as it was just 1 year old. Very little brake ped left going down hill. Going down hill and step on the brake and there was a bad vibration and growling noise from the brakes. I had it checked and the dealer ground the brake rotors. This never solved the problem, so they replaced the rotors. This solved the problem for the warped rotors for a while. Now the problem started again with 23000 miles and only growls and vibrates when going down hill where you have to step down a little harder. Had it checked out again and they say the rotors are warped again. I replaced the rotors and put new brake pads on and the problem is still there. I do not drive the vehicle hard and only about 4000 miles per year. Whats causing the brake rotors to keep warping.