I took my van to the dealership 3 times in the past 2 years about the same sound when I pulled off in the morning to start my day. As the day went on if I was parked for a long period of time, when I pulled out of my parked spot the same noise. Took the car to the dealership who claimed they couldn't find the problem. This weekend while driving the pedal went to the floor. Barely stopping the van, no screeching no noise, just pedal to the floor. Took the van to the local auto shop and they pulled the brakes noticing the master cylinder was completely done! They asked had I heard noise before. I explained yes and the dealer couldn't find it. This local mechanic says this appears to be something that has been a problem for a while and this car at only 44,000 miles shouldn't have this type of issue...its not typical. Called the dealership and they claim this noise couldnt be the master cylinder and its not their issue. Totally disgusted.