Hello everyone I’m Brett, i have never posted on this page before. But I have experienced the noises everyone’s explaining and believe it or not I had to have my driveshaft replaced. It was a loud clunk under the truck, as I would accelerate and brake. GMC fixes the problem without an issue. After 3-4 months I’ve noticed the noise again. I have a 2020 at4 carbon pro 6.2.