I had a similar condition on my 06 Rxh. There is a service bulletin on it. I assume that is the procedure they followed when they bled your brakes. After a couple of attempts, I convinced the dealer to look at it. They tried the bleed procedure and told me it didn't correct the problem, so they replaced the actuator, which corrected the problem. Done about 3 weeks ago, and haven't had the chirp problem since. It was all done under warrantee. Took them 3 days, but of course I had a loaner. I think it would have been quit expensive if I had paid for it.