Hi everybody! My name is Greg & I am new here, so forgive me if this has already been discussed (if so, please point me to a link). I have a 2005 Tahoe LT2 with the XM ready, 6 disk cd player with stock rear entertainment & Bose speakers. A buddy of mine is giving me the Navigation unit from his '05 Tahoe Z71 that he parted out. My question is this: What all is actually involved in putting that Nav unit in my Tahoe? Is it just plug & play or are the actual plugs/wiring differant? Do I need other parts, such as a different antenna? Or would saving up some $ & going with aftermarket be the way to go? I tried talking to another friend @ the service & parts counters @ my local Chevy dealership, but they say they never had to think about it, so they don't know. Thanks for reading. Greg.