Early55

The front brakes on my 2015 Colorado were replaced about 6 months ago and I've been getting a chirping sound from the right side for some time now, but only occasionally. When you start braking it starts and quits when you let off the brake. I have had it in numerous times and the dealer cannot duplicate. Two weeks ago, the mechanic road with me and heard the problem, but today when I finally got it in, they couldn't duplicate. Has anyone had a similar issue? Any solutions?