need some help here. went to a friends house tonight, and parked the truck on a slight slope. when we went to leave, i went to press the brake, and the pedal went pretty far down. i got kinda worried, so i tried adjusting the pedal height, but still was kind of soft. drove a couple hundred yards, and the pedal feels like the power assist isnt helping. the pedal goes all the way to the floorboard, and i have to really mash on it to stop the truck. i got it home, and parked it and havent looked into it. i wanted to ask you guys and see if maybe someone has had this same issue, and could help me out?? thanks in advance!