My Acadia came with XM Radio which expires next month. I really don't use it enough to justify the monthly cost so I just purchased an HD radio from Crutchfield (http://www.crutchfield.com/S-ePLATOlvyqD/cgi-bin/ProdView.asp?g=186650&I=60744000 - $160 after rebate with free shipping right now) The three FM stations I listen to 99% of the time all broadcast in HD, so this seems like a good solution for me. I know I can plug it in the aux jack on the front of the radio or use the FM modulator but does anyone know if there is a way to plug it in directly, maybe even in place of the XM? I should have it by Monday, I'll let you know how the installation goes. Since the Acadia is new, Crutchfield doesn't have specific installation instructions. Has anyone posted directions about taking the console apart to get at the radio?