This AM I got a notice via OnStar that I needed to get a software update to my battery system. The notice said that it was to solve the issue of not indicating the proper remaining range when the battery is about depleted. I had the update done and as far as I know, all went well. However, all of my customising of the charging schedule was lost. Not a big deal but, if you rely on the car for daily transportation, it could mess up your charging routine. My home location was lost and as such my scheduling was lost also.