brake pedal go to the floor on a 2001 gmc hd
I have put a caliper on right rear and replace to lines and bleed the hole system pedal still gos to the floor and the rear tires will catch and fronts don't catch and I got pure fluid but not much pressure
Master cylinder problem and/or Proportioning valve. That is the device that if your master cylinder fails in one stage you will still have brakes. Some cars it will apply brakes to front some to rear.
FordNut, what about air in the ABS system, if so you need a scan tool that plugs into the USB port capable of interacting with the computer of the car, to bleed out the ABS system.