I was having the vibrating issue everyone is talking about. It all started when i put 22" wheels on my 2014 CC Silverado. I kept taking it to discount tire and the dealership thinking there was something wrong but neither really helped much. I decided to throw my 20" wheels back on after dealing with it for 5 years and vibrations are 90% gone. I had them tires road forced balanced and that has fixed the issue. Its even better if i have a heavy load in the back. Ill try to add the clamps to see if the vibration goes away completely.