I'm coming from a Pioneer X920-bt to the Appradio2, does anyone know if I can reuse harness from that unit?? I know it's a longshot question but maybe someone here has done it.. thanks!

Not sure if this helps, I just switched to the AR2 from an AVIC-F90BT. The GPS and Mic are the same plugs, the harness plug is the same BUT, Pioneer saw fit to rearrange the all the connections on the plug so I had to redo mine.