I have a 2006 LBZ CC with the OEM Bose, 6 disc changer, steering wheel controls and On-Star. I wanted to be able to plug in my 'Droid when on long road trips as I have close to 20 hours of serious jams stored in it (my workout tunes). I purchased a supposedly hi quality aftermarket interface that plugged in between the factory connectors and gives you a remotely mounted 1/8" stereo input jack. You tune to a particular XM station number and then use the phone. Well long story short it's a POS. The gain rates are way off and the sound quality seriously lacks. What I'm wondering is what year did the factory units begin to offer the face mounted aux input jacks and can one of those OEM units be fitted to my '06 and have everything work correctly? I'm totally happy with the factory unit and the Bose, just want to be able to add my phone for a music source.