Bouncy Brakes

I have a late 2014 Silverado 1500, brand new tires, brake pads, upper control arms and rotors as well as fresh alignment as of this weekend, but its still shuddering/bouncing when braking, what could be my issue?

Edit: Should have stated I did all the parts replacements myself, have done the same thing on plenty of other vehicles with no issues. Shudder seemed to lessen during and towards end of my 1 hour drive home