Service Update N252516700 High Voltage Battery Software Update

GM Has released an OTA Software update for some of its EVs which updates the software for the High Voltage Battery.  GM says This software remedy changes the threshold for setting DTCs P0AA6 and/or U359E.

Due to this change, a small number of vehicles may set these DTCs after the vehicle goes through its 1st sleep cycle.

Although unlikely, any vehicle with a pre-existing condition may set either of these DTCs soon after the OTA update.

If the DTC sets, you should schedule service with your dealer as the
vehicle will need repair.

This update applies to the following vehicles: