Hi C6BLUS,
We have gotten this question before and it appears to be a software issue that GM is aware of.
Take a look at this post from last month. Most people are calling GM customer care and getting the issue documented. However, most have reported that they have not come out with a fix yet.
Please let me know if you need more information. Thanks
https://www.2carpros.com/questions/navigation-screen-clock-not-working
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Wednesday, June 5th, 2019 AT 4:28 PM