Since then it has happened maybe twice, for about 3 or 4 minutes each time. I have driven about 2,000 miles in that time; so it is pretty infrequent, but I have never hear a loud noise like that before, and it is disconcerting.
I am getting an oil change next week, so I want to have the chirping noise fixed. When I asked before, several people said it was worn pads or rotors. One person said it was pins the front caliper rides on needed a little bit of brake grease.
Given the infreqent nature of the noise, does the worn pad or pins make more sense? Or something else?