1991 Chevy Truck front pasengern side brake stays acuated a

I have a 1991 chevy silverado 1500/ I have changed master cylinder, both brake calipers, both rotiers, and new pads. For some reason the passenger side brake is wareing out pads and rotiers left and right. They are all blead correctly mounted right but if I open bleeder valve when it locks it will release but soon as I hit the brakes they lock up and burn up every part that is on it , I even put brand new pads on it and they were worn out in about 80miles this thang is killing my gas milage (PLEASE HELP)