2002 Chevy Suburban 2002 suburban shakes violently

if its when braking its a brake rotor issue, the wobble description leads me to beleive you may have a tire issue, jack up the vehicle, supprt it on suitible jackstands with tires off the ground and spin tire by hand and watch the tire for any "bubble" or wobble on all tires, the rear of the vehicle you will have to place the transmission in neutral. dont forget to check those ujoints in the drive shafts for loosness you should not be able to move the up and down or side to side....... set parking brake or chock wheels and place transmission in neutral to check this! good luck and happy hunting!