ok... as I posted on another thread I have a 99 2500, front brake was locking a few days after I changed the pads.. I replaced the hose for that wheel and bled the brakes.. good for a day or two then the pedal went to the floor... I have re-bled the brakes and not getting any air out but I don't get any pressure from the pedal being so low... there is a change between engine running and not... the truck will stop but not a good feeling.. master cyclinder or booster pump????