So I bought a one owner 2015 gmc yukon denali and right away noticed a terrible noise on the drivers side when you go over any sort of bump or hill. It is much worse when you sit in the middle bench seat. After 6 months of my dealership trying to figure it out ( replacing all shocks and much more) I decided I was done and traded it in on a 2016 yukon denali xl. I have now owned the car for 3 weeks. The first couple days I didn't hear anything. So excited! But then I pullout to the side of the road and boom I head it! It was minor so I ignored it. But not it is all the time just like with my 2015. My dealer acts like I am crazy. The white one got so bad it sounded like you were driving a Styrofoam cooler! Any ideas??? I am trying to decide if I just get rid of it but I love everything else about it!