I am getting a vibration in my front right tire on my 05 yukon xl 4x4. I had the tires rotated and balanced, the vibration is still there. It only happens at 65mph or above. IF I take the truck up to 90mph, I get a loud howl from the right front. Not at 89mph, it must be at 90. I jacked it up and attempted to wiggle the tire and get nothing. I have also loosened the axle nut while it was lifted and attempted to move the tire, still nothing. I have seen really bad wheel bearings not move with the nut tight, but as soon as you loosen it then it wiggles all over. It could be the CV shaft. I am not sure. How do YOU diagnose a bad wheel bearing? I hope that some of the guys like @RayVoy have some tricks for this. Do you have any other ideas what my vibration may be? I would rather not just throw a CV shaft on and find out that it is the bearing or vise versa. Thanks Guys!