Your lift and larger tires did not loosen your wheel bearings. They were loose from the factory. This exact thing happened to my fathers stock Rodeo. He took it in for its first PA safety inspection (~2500mi) and the tech told him the bearings were loose. I tightened them up for him and its been fine ever since. Snug um' up and forget about them, they'll be fine.
Rich - Ashburn, VA