Rkkiz

I’m at 3000 miles and I noticed that it comes from the long trim piece around the tail light on the roof that goes all the way across from door to door . I have the 2019 Chevy custom. And it happens when it’s been out in the heat and when I make sharp turns or over a bumpy road. Not so much in the morning when it’s cool l. It only happened a little at first but has gotten worse. Almost like the plastic clips underneath the trim strip are flexing. If you push down on it. You can re-create the sound. Mine is a double cab