I have something new going on with my 2012 Volt when I tap the brakes. I get a light click or tick noise when light pressure is put on the brakes. The car has almost 36000 miles on it and sounds similar to a clicking noise I had on my old 2001 Impala. It was either due to the caliper or the guide/slide pins for the caliper. If I remember correctly, I ended up replacing both before the noise went away. Has anyone else seen or heard of this condition with their Volt?