I have a problem with my brake pedal being stuck, after applying my brakes. I can physically pull the brake pedal back up afterwards and it may do it a couple more times, but then ok. It seems to do it mostly in the morning, but not every morning. I have had this problem for the past few months. I replaced my front calipers and rear cylinders, early last year. I then replaced the master cylinder and the brake booster and thats when the problem began. Tried another brake booster and still the same problem. Have bled the truck 3 times. Thinking it may be in ABS system, but kinda out of directions to go.