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My gmc app not working after installing new version

New Contributor
2021 gmc sierra
I went to use my iPhone app to start my car earlier this week. It said my app was out of date so I updated it.
It still would not work. When I sign in to the new version of the app on my iPhone it says my app is out of date and to update. When I hit update it takes me to the App Store where I can only open.
Then I try to login again and it says service not available.
App version is 6.23.1.
I have deleted and reinstalled The app multiple times and the same thing keeps happening.


Thanks for bringing this to our attention. First, please know that the myGMC app is compatible only with devices operating on iOS 14 and above or Android 10 and above. If your device is not capable of upgrading to these operating systems, it will no longer be able to support the app. Feel free to send us an email to with "ATTN: OS Community/243ackley" in the subject line with any further questions.