I called a service center and looked in the manual, and I think that's true. It looks like Chevy downloads updates OTA (over-the-air). Ford is able to connect to a home WiFi, but I don't think Chevrolet can.
I'll be the first to admit I'm not up with the 4G Apple Car Play android auto capabilities. Are you able to send navigation instructions from your home wifi to the car for navigation after you no longer keep the car's data plan?
This sounds very interesting, and would make some of the navigation features usable to those that don't keep onstar past the new car trial period.
Subscribing to see where this thread goes. I'd be interested in doing something similar when I get a new Chevy with network capabilities..
I haven't done it, but having said that, I'm as certain as I can be that you could load the instructions. I'm less sure that the car is able to locate itself via GPS to follow those directions. And I'm certain it couldn't adjust for a wrong turn unless you make your phone a hot spot and let it connect that way. I think I'll just connect my phone via Apple car play and use the maps app for navigation rather than on star.