This particular car did not come with factory navigation, something I was positive that was standard on every LTZ models beginning 2013.

Researching this topic has led me to one vendor who claims to have factory full NAV with complete integration of all functions pertaining to factory NAV and my link integration. The company is known as AutoSpa Tech based in Colorado. I've seen the videos of this system in stalled in a Terrain 2013 and indeed it appears to look and work like the factory product. In fact this is one if their major advertising points that it is indeed the same package installed by GM.

Does anyone have any suggestions or additional information or experience with this firm or adding a fully compatible navigation system for this car?

Thanks indeed for your assistance.