Searched on "hyper sensitive brakes" but maybe I'm not doing it right. Just drove 7 miles to store and back no problems but as traffic slowed to red light to my street on way home I rolled to - not quite a stop so lightly touched the brakes and they screeched to a halt. I let off the pedal and truck operated fine moving forward, put 4 way flashers on down my street until I found a gravel parking area to pull off and was just rolling and touched the brakes and front left wheel locked up stopping the truck. was not completely on the gravel, just right front and it dragged the wheel. quarter mile down the road I pulled into my driveway downshifting to slow then tapped pedal and screeched to halt. Mileage 220k, I bought truck at 170k and have replaced rotors, calipers, pads front and back in last 5k miles. Don't know if any other brake components have been replaced like master cylinder. No ABS or other brake warning light on while driving. Any ideas?