I have a '93 Dakota. Basically my son replaced the front pads and since then the brake pedal goes to the floor. I can stop the truck by pushing EXTREMELY hard on the pedal but basically there are no brakes. My question is, is it a bleeding problem or something more severe? I have tried to bleed it until "the cows come home" but it doesn't seem to work. Any help would be greatly appreciated. Also, I have looked at all 4 wheels and I don't see any leaks. Thanks guys.