Hi guys i'm new to this site and think i may have burned myself. I have a 2008 silverado ltz with the bose system. I just bought a nav system off ebay that came out of a 2009 sierra but i didnt know the model of it. I get the nav and its got a part number of 20790838. And now this seems to be the rarest part number of navs out there and i only found one post saying that it may have come out of a non bose truck. Is that even possible? Anyone know if it will work? Thanks in advance