It could be any or all 3 of what you mentioned. From what you describe, though, my money is on worn out brake pads. Most likely, you will need to replace the rotor as well. If the pad wear is uneven from side to side, you should also rebuild or replace the calipers. Rebuilding is MUCH less expensive, but more labor intensive. GM product brake pads have wear indicators. Ask your wife if she heard a squeaking sound before the grinding.
Friday, September 30th, 2011 AT 7:32 PM