I have a 2008 Tahoo LTZ with Bose, Nav, Onstar, and RES. I just installed Pioneer AVH-2440NEX. Bought from Crutchfield with Maestro iDatalink module. Everything works with steering controls, warning chimes, backup camera, and DVD playing on rear screen. The one thing I didn't think about beforehand when researching HUs, was the wireless headphones. With the factory unit, the kids could watch DVD's in back and listen on wireless headphones, while the wife and I listened to the radio through the speakers. I can't seem to figure out how to get this function to work on my new Pioneer. Anyone have any ideas? Crutchfield guys said on some radios it works, some it doesn't, but couldn't find any written specs on which ones retain the function. ????