NHTSA Complaint #11504478 — 2016 CHEVROLET TAHOE

Hello, I purchased my truck last year in December and I told them the problems I was having with the truck when I got. They act like they fixed it but it’s still doing the same thing. I’ve put struts on it and control arms 3 times and it still is giving me problems. My suspension and driver assist warnings always pop up. When I get up to 85 mph, they truck shakes really bad and the speed won’t go over 85 mph. When I got brakes, the trucks pulls to the left and right which I know that could mean a line up but even after I line it up, it still does the same thing. I feel like it’s a defect with the suspension and driver assist systems with those model trucks. I love my truck and really don’t want to get rid of it. I’ve taken my truck to my dealership several times and I don’t want my warranty to run out before I can get my truck fixed. Can you help at all???