wheel bearings on that truck are sealed.....When they go bad, you replace the bearing/hub as an assembly.....They should last at least 100,000 miles if truck is not treated roughly....I owned a 2000 Silverado that had 146,000 miles on it when I traded it in....and still had the original wheel bearings on it and they were still in good shape.
They don't, they are packed with grease before they are assembled together. That's all the grease they get for its lifetime!!!! That's why you don't hold high pressure washer hoses up against them, you can force water into them cause them to fail quicker
