I was in contact today with a member of the VoltDC App team it is being maintained/developed by commonwealth-team.com. Here was his response on why the VoltDC App has been unavailable now for over a month.
Now why is this not being handled as a priority? This is a customer facing application and should be addressed ASAP. The fact that it has been down now for over 30+ days is really poor customer service.The issue is known, and is in the OnStar bug queue for sorting and resolution. Beyond that, sadly, I do not have any solid timelines from GM's IT group. There were a number of issues with the latest upgrade to the RemoteLink software and services, so the teams are actively working on fixes to resolve those issues. We have identified the changes that need to be made, and are waiting on them to be prioritized in the queue and executed.