What does it mean when your brakes lock up?
What does it mean when your brakes lock up? The brakes locked up, and I went to the Master Cylinder and loosened the brake line that was closer to the front of the truck (which I believe is the rear brakes). I loosened it enough for fluid to come out, and then all of a sudden the wheels broke free and the truck "rocked" into park. How do you know if your Chevy has a brake problem? You will find the booster between the master cylinder and the firewall in your engine compartment. A check valve that is faulty can...