Originally Posted by Chevrolet Customer Svc
Have you had the opportunity to speak with your dealer about you options with upgrading your navigation system? If not, I can investigate that for you more. I would need you to private message me your VIN and your dealer's information.
Chevrolet Customer Care
Yes, I did talk to the dealer 3 of them, and they said it would be a high cost and was factory only. Yes there are many after market NAVs out there that you can upgrade to.