In July, I bought a 2017 Impala LT, I got a good deal on the car and overall, I’m happy with the car. I would thou like to if possible upgrade the Nav, it’s the most basic navigation system. Can it be done? I can always connect my iPhone 7P but had rather keep my phone freed up. I asked at the dealership and they didn’t have a clue as to do what I want. So is it like a different module or is there more to it than that? Thanks to all..