Radio/Audio System Description and Operation: Clock
WARNING: This page is about a different car, the 2019 Cadillac XT5. However, it is still accessible from the selected car via links, so may be relevant.
The digital clock will display on the infotainment display screen. When the Auto Set feature is turned on the time and date will automatically update via the cellular connection of the OnStar module. With certain versions of OnStar (Gen 10) the Auto Set feature will not update during ignition off/Retained Accessory Power. Once the ignition is turned on the Auto Set feature will update and the clock will display the current time and date.