I started getting some noise from the back end of my 2005 C6 z51: loud highway hum, and some popping at extremely low speeds when maneuvering in and out of parking spots. I wasn’t entirely sure that my problem was the wheel bearings, but I bought two of these and gave it a shot. It fixed the problem. MUCH quieter on the highway and no more popping at low speeds. Do yourself a favor: watch YouTube videos of people replacing these before you try it yourself- it’ll save ya a lot of headache.