I have a 2003 tahoe 4 wheel drive. When your driving the rear passenger tire is wobbly and looks like its going to come off the vehicle...would that be the rear wheel bearings? If not what else? The first thing i checked was the lug nuts and the last time the tires were put back on was at a dealership. so i know its not that. any suggestions...

 

Welcome from Florida. Take the wheel off and check to see what is moving.

 

Yikes! Park it till yuou find the problem.