All brakes stuck on

[Dan]

Update -

Last evening I went to where I left the truck sitting for a few hours. Started and put into gear and it rolled freely. So the pressure buildup slowly released itself during that sitting period. I was able to get it home without using the brake pedal, just a couple times on the e-brake at intersections and then just rolled thru. Once home I checked the rotors. The front two were cold. The back two were both hot to the touch. Evenly, both about the same hotness. Today Im going to recreate it and see which wheels are stuck so I'm 100% sure of that and go from there.

Still thinking master cylinder. Its not the e-brake because thats mechanical and should have no effect on the line pressure and the pedal becoming rock hard.