i dont know if this has deen addressed yet but here goes--- !st off i own a 2011 terrain slz and last night whike driving my granddaughter,siting in the back wanted some fresh air. She rolled down her window and the car started to shake. the front window on that side was up all the way. I thought i had a flat tire but the moniter said i was aired up. i had her put up the window and the shaking stopped. So the next day i experimented. If you have the back window down on either side without the front window down it will shake the vehicle. As soon as you roll down the front the shaking stops.Tried this numerous times. Does this vehicle nave an issue or is this a design flaw..Any help would be appreciated