May 2025 - Hummer EV OTA Update N25-2498340

[super8]

GM is rolling out another OTA update! According to the release notes:

* Improves accuracy of service messages for high voltage charging system
* Reduces drain on 12V Battery.
* Improves performance of charging.
* Improves performance of wireless communication of the Lithium Ion battery status
* Improves performance of cabin heating and windshield defrosting system.

 

[super8]

I received the update this morning, and it installed without any issues. However, it did seem to take quite a bit longer than the estimated 15 minutes.

One interesting thing I noticed: before the update, I had 135 miles of range, but afterward, it showed 175 miles. Maybe it just needs to recalibrate after some driving time?

 

[Hummerev81573]

Still anxiously waiting for mine.