I sat in the back and opened the door thru the detents, and It did seem to make a noise when it hit the detents. I compared it to the rear doors on my gmc crew cab and I would say the suburban was louder, but I dont get that sound going down the road. If that is the sound you get that everyone is talking about driving down the road I now understand. I dont get why our suburban doesnt do it while driving.
Our suburban does not have ANC according to other posts that listed the codes for installed options. Maybe that has something to do with not hearing the noise.