Found their website and sent them a message thanks!! Yes, I remember the ANC freaked out in my RAM and I had to disable it. I am assuming I would have to disable it as well in the Yukon. Do you happen to know how? Once I install an aftermarket AMP that will kill that feature anyways i believe. In the RAM, I just had to go into the headliner and unplug the microphones and that solved the humming issue. Not sure if it would be the same here. Thank yiou again all this information you are providing is very helpful.!!