2015i_Denali

Sorry about your misfortune FOURKNUCKLES. I'm from the Dayton area as well and plan on ordering a 15 Denali. This is obviously a major issue that leaves people scratching their heads. I'm curious as to whether or not anyone has tried shifting into a higher or lower gear to change the RPM's to see if it has any an effect on the noise. Being that it is more noticeable when in 4 cylinder mode caught my attention. Do these trucks have an active exhaust valve to regulate back pressure for the transition between 4/8 cylinder mode? Drone sends a frequency through your body which can make people nauseous.