I see this is an older post but if anyone can help it would be great! My 2010 CTSV has the same issue. The car was brought in and I was told it was a right rear wheel bearing. After the replacement the noise is still there. Originally,I thought the noise was coming from the drivers side but who am I to tell a professional their job I guess. Anyway,I was told that parts would have to be changed one by one to solve the issue. Should I just have the other bearing replaced and hope for the best?