Thanks Brent, that is actually very helpful.
One person mentioned re-installing the app, that is why I wondered.
Apparently, this update was poorly tested. That or the call center begged for something to do and are now inundated with calls.
One of the UI designers posted on the forum 6-9 months ago asking for input and got an earful. They seem to have listened to a few common themes like automatically synching when you open the app (even though this fails most of the time). One thing I was hopeful for is to change connection priorities, try WiFi first, then Bluetooth, then OnStar\cellular. Sadly, that doesn't seem to be included.
So, now that you have it working, are you pleased with the update? Did you use the old app much (you are fairly new on the forum, so maybe not).