Hi all. We just got a 2008 AWD Acadia SLT-2 fully loaded. The only problem is we can't get the two wireless headphones to work. The batteries are installed correctly and both headphones power up. I also understand that the rear seat audio needs to be on. We've followed the manual/instructions to the letter. We've tried with both a DVD and the radio using the 1 and 2 settings and we get no sound other than a tiny bit of noise/static when you turn the volume controls on the headphones all the way up. Has anyone encountered any issues with the headphones. I'm wondering if there is any kind frequency that needs to be set or switched that is not matching the system signals. Any thoughts?