Wow!!! I just bought my truck on January 26, 2019 and have 100 miles on it. It is definitely having the issue that is being described on these forums, relating to the ANC. I have an intermittent light saber sound just by stepping on the gas. I can even make he sound happen with the stereo turned off. At first I did not understand where the sound was coming from and started searching these forums. Somebody out there said roll the windows down. I tried it, and I rolled the windows down in the middle of the truck making the sound. Like magic, it just disappeared. I tried to repeat the scenario a few times, and every time I rolled a window down the buzzing sound would stop immediately. However, currently, it is -40* in Milwaukee, so driving with my windows down is not an option. I am going to call the dealership this morning and see what can be done. Wish me luck.