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mine works in my 18 thru the 4g (as well) but I have mine set to use my own hotspot in the glovebox because it is free to me, no phone is needed.I can't access Spotify or Pandora for example without my iphone, I don't always have my phone in the car, What gives? I have a 2022 Yukon XL Denali.
your denali can access the built in app's with a simple intenet connection, be it onboard or not.Not sure how the new, new GM stuff works, but I was always under the assumption that you needed whatever phone present that is linked to said account.
My 2017 Denali is that way. My 2023 F450 is the same way as well. Android auto, or Apple car play only works when device is present.