baffled118

I have a 2006 Silverado and the brakes randomly lock up. i have replaced the pads, rotors, were told calipers are fine, brake lines, master cylinder, and booster but its still doing it. Also when they lock up, I can get it to release my manually bleeding the line or just letting it sit long enough to cool because hubs are smoking hot. Been to two mechanics and while they have been able to replicate the issue, they cant figure it out. Does anyone have any clue??