I purchased this 2021 Chevy Silverado 2500 HD High Country new. Early on the brakes started squeaking and roaring at low speeds. I contacted the dealership to see if it was a warranty issue. They said a technical bulletin was coming. They changed the brakes out per the technical bulletin at 30k miles. I called the next day and told them it did not fix my truck. They said to see if it got better. It has not. They changed out the wiring harness for the entire camera system just before the warranty went out. I talked with them then to see if GM would warranty my brake issue. They said GM said the noise was normal. If I wanted they could change the brakes at my cost of $800. I declined. This is not a normal sound. The truck now has 89k miles and is still making the embarrassing sound. I have been a loyal GM customer purchasing several new vehicles for the last 20 years. I am very disappointed in this truck.