Re: 2015 JGC Buzzing Noise??
That's the electro/hydraulic steering and is 100% normal. IMO taking the vehicle in for this is a waste of time and just the opportunity for the dealership to screw something up while its in their possession. The vehicle sounded perfectly normal to me in that video. Relax and go enjoy your new Jeep :-)
2015 Jeep Grand Cherokee High Altitude, Bright White, V6, HK audio