Ok, i have a question for. Hope you can help me out. I have a AVIC-Z110BT and have it installed in a 2007 GMC Sierra with factory rear entertainment, I can get audio when playing the movie over speakers and headphones, but when i turn off the movie on the head unit, the video still plays on the rear screen but not sound is produced through the headsets in the back. What ever the deck is playing the headsets are playing. Can you help me fix this issue? Thanks in advance. Chad