MIKE-CHECKA

Just bought a 2019 Colorado December 8th. It had 34 miles on it when I got it. Noticed the shudder (currently very mild) almost immediately and thought is was just the ride of the truck. Then I figured out I could kind of make it happen. So I did a quick search to find that this is a known issue. Took it to the dealership with 1500 miles on it and told them what it's doing. They took it in and for a day and gave me a rental. Got it back and noticed on the paper work that I turned it in with 1585 miles on it and got it back with 1586 and it was noted they couldn't reproduce the problem so they put air in my tires. Guess what, that didn't fix the problem. I'm going to call them and ask what they did to be sure I'm not crazy and that all they did was put air in my tires that did not need air. The problem may not produce itself in mile. I usually feel it most between 45-65 mph. Also, is this the Chevy Shake? I have seen videos where the whole truck is shaking the entire time. Thankfully I don't have that... yet.