-I have a 22 Silverado 2500 LTZ 6.6 GAS and the noises at low speed or idle in drive are definitely not normal. I have what sounds like a quit fuzz or blown speaker in the area of the dash speaker on the drivers side. With all AC and radio off its still there. It disappears after it seems to shift out of first. Seems to react to the brake pedal slightly.
-When the truck is in park and you first push on the brake it "clicks loudly" and then clicks again right before you let off. Like one of those dog training clickers. Doesn't do it in drive.
-The Hill decent grinds and clicks all over the place!
-There is a loud whine in first gear that gets louder with the RPM
-Oh and the SD card keeps saying its removed until I remove it and put back in. I have made sure the "lock" on it is in the right position. this is random and not all the time.
-I only have 450 miles on it, I was hoping these things would get better but I might have to take it in!