My 2003 Chevy Silverado 1500 5.3 l four-wheel drive started to shake randomly one day not long after I had My tires rotated and balanced and in a full alignment done. So thinking it was something tire discounters did I had them redo all that and still starts randomly shaking every once in awhile. And before that I replace tie rods upper control arms upper and lower ball joints and sway bar links, so my steering seems to be perfect besides this weird vibration every once in awhile and it gets worse if I press the brakes while it's doing the vibration it gets much worse. And I recently replaced front CV axle I even replaced the rear u-joint in the drive shaft. So if anybody has any ideas please let me know I'm so lost with this