GMC Sierra Booster Replace/Remove

My Brakes After Couples Of Stops, The Pedal Gets Stuck, First Time I Thought It Was The Calipers, But I Replace It And Still Doing The Same...

So My Brake Pedal Was Very Stiff An My Truck Was Barely Stopping So I Changed The Brake Booster.the Issue Has Not Changed. It Is Still Hard...

My Front Brakes Started To Hang Up And Did Not Retract So I Replaced The Rotors,calipers,bearings,and Master Cylinder.but They Are Still...