Has anyone else experienced this? At highway speeds it sounds like there is a humming coming from the rear end. I don't notice it while crusing arond town but it is definetly there at high speeds and the pitch will change as speed increases. I have a 2001 LS V8 Sport if that makes a difference. It only has 43000 miles. Thanks in advance for any help.

Scott

Could be cupped tires. Have you checked them?

Could be cupped tires. Have you checked them?
Yes, the tires look good.