The front brakes on my 1987 S 10 Blazer occasionally lock up when coming to a complete stop at low speed or almost a complete stop, this doesn't happen all the time. I replaced the meter or purportioning valve, front calipers,turned front rotors, rear drums and replaced pads and shoes. I then bled the brake lines as best I could, and I still have the low speed lock-up. anybody have any idea what is causing this. Thanks, Paul

 

your brake hose could be colapsing internally,you reused the old slide pins, or you didn't lubricate the slide pins enough.