That's OnStar for you -- they say an app needs data but it has to be THEIR data plan, that's overpriced like ****. No experience with GMnav+ but I can promise you that android auto/apple car play is light years better, you can also integrate A Better Route planner as well if you like and use it for road tripping charging locations/calculations.
When they intentionally design a system to be a cumbersome, expensive, and shitty as possible, I nope out. I only had like 1 month of free onstar with my 22 EUV, they won't be getting a dime from me under any circumstance.
The funny part is for all the money they are scamming off people for data plans and "premium connectivity" you'd think they could build the myChevrolet app that actually works after 7 years. The thing has been a turd since 2016 when I had my Volt.
Fully understand the anti-OnStar diatribes. But just for a moment (don't kill me!!), I'd like to provide an alternative view.
It doesn't seem to me that $200/year for unlimited data is all that expensive. Maybe I have a skewed perspective.
I also have to confess that I have "Premium" OnStar services.
Remember that you don't have emergency notification of a crash situation if you don't have OnStar services. If you bought into the iPhone 14 generation or have a recent iteration of the Apple Watch, you can rely on those. I'd rather be double covered.
I got lost once in the countryside of rural Virginia horse country. Really lost, looking at stone fences and horses.
CarPlay was no use because (surprise!) no Verizon signal and no T-Mobile signal. There was maybe one bar of AT&T Enterprise, but not enough to get the CarPlay map to work.
To my surprise, I was able to speak with OnStar and get directions out of there. I don't think it was because AT&T Enterprise had great service so much as it was more related to the car's cellular modem being able to use more power than the iPhone could use. I didn't see much OnStar cellular signal but it still worked.
CarPlay came back and gave me Maps via the car's cellular signal, several miles before my two phone numbers had signals again.
So...just an alternative view and maybe something to think about if you have these little bits of money to sacrifice.
Remote Start: I'll use that constantly all through the winter months.
The Energy tab's route planning to include charging stops? That's something you might want to use if you're going to travel long distances in a Bolt EV, although of course you have to send the route to Maps.