UPDATE: It always bothered me that my 6 disc player in my 2004 Armada with Bose, Nav, etc. would not play MP3 CDs. I bought a 2006 CD player on Ebay for $84 and it arrived earlier today. I swapped it out with my original one (it took 5 minutes) and now I have MP3 capabilities! I know this may still seem old-school by today's standards but as I mentioned a couple of posts ago it is virtually impossible to upgrade the head unit in my "fancy" LE version of the Armada due to the car-computer, nav screen, climate control, etc. and still retain all of this stuff on the nav monitor. This was an acceptable compromise. I have also added the Naviks unit for backup camera viewing on the nav monitor and mirroring of my Android phone.