Last I heard is that the 08 and up haven't figured out how to replace the unit as the hvac controls and display are integrated into the unit cause I have the same problem with ours. I have seen someone add another headunit to it though.
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2008 Armada SE
No Mods as of yet. Wife doesnt want anything done to it but we will see.
2010 Titan Pro-4x:
Maganflow DISO muffler with JBA tip. Factory matched window tint. Tinted tailights, Debadged. Volant Powercore intake.