Originally Posted by
dwbf11
LT and up. I think it's fleet only though; it appears from Chevy's website that for consumer sales navigation requires the Sun, Entertainment & Destinations package (despite appearing as a +$495 standalone add on).
On the GMC website, you can add Nav without adding the Sun, Entertainment and Destinations package. A popup box will appear asking if you want to add S,E & D, which you can then deselect and choose the Nav as a standalone option.
The 3D maps feature was handy!