Skididdy

I just picked up my 2020 2500HD with the Duramax on Friday. After 500 miles I feel compelled to upgrade the sound of the truck. It is altogether too quiet. I’m not looking to be the obnoxious attention-seeking jerk, but I do want the truck to make a bit of an impression. I’ve never owned a diesel, not have I ever added aftermarket exhaust to a truck. Do’s or dont’s from personal experience out there? What does or does not void warranty?