I got vibration everywhere on my Acadia. You can't even talk clearly while driving it. That's how bad it is. I looked at the wheels and one on the front had some lead balancing weights missing. Found one of them in my driveway. So I took it to AAA Bob Summerel to have that wheel balanced. They said my tires were bad. The tread was choppy and causing the vibration. I find that hard to believe because the vibration just suddenly started. Tires don't just wear down that quick. If anything the vibration should have slowly increased over time then I would believe it was bad tires. So they end up not balancing my tire. So i rotated the tires and seemed to make it a little worse. I then jacked up the front end and on both sides I am able to wiggle side to side each wheel a good half inch. So now I am wondering if its a steering component. The outer tie rods are tight with no movement, so the movement is occurring on the inside where the rack and pinion is. I'd like to get another year out of my tires, but I'm afraid if I buy tires I will still face the same issue. I'm wondering if anyone has had the same issue but related to a steering component.