Question: Navigation head unit differences

DMAX102

Member
Sep 9, 2016
59
0
6
Spokane WA
I am looking at replacing my stock radio with an OEM Navigation unit in my 2011 LTZ CC. I am wondering what the major difference in the different years are.
From what I have seen, there are applications for 07.5 to 09, then 10 to 11, and then 12 to 13?
Is that correct and if so, what are the differences?
My rig does have the backup camera in mirror, On Star, Bose, and XM. it does not have rear entertainment if that matters.
I have seen the 12-13 models are hard drive equipped, Do the older units require a disc to operate?

Appreciate any and all help/suggestions you all can offer.