I recently purchased a 2021 Chevrolet Silverado LT Trail Boss (3 months ago) and last weekend I experienced my truck making a very strange noise. I quickly contacted the dealership and they just confirmed that my lifters are defected. They are replacing the lifters on the truck this week. My first GM truck I bought was a 2006 Silverado. That truck is still up and going with over 220,000 miles. I then purchased a 2016 GMC Sierra and the dealership notified me of the truck being a lemon due to the transmission. Now I am worried about this brand new truck having these issues so early on.