Tire change then SHVCS

Sorry, I should have mentioned that I checked the coolant level this morning before posting; it's the first thing I thought of after following this forum for a couple of years. The coolant level is a little below the max line, but well above the min line. I guess now I'll need to hope that it is a random, minor thing when I take it in to the dealer on Monday. Whatever it is, we drove the car several times that day and plugged in with a successful charge several times as well before the failure.

Thanks brentalan, I've saved off a shot of your invoice to take with me on Monday.

Steverino- I saw a set of arrows on the passenger side of the coolant reservoir that I assumed were indicating a low mark line. I must have been mistaken. I don't have the WOT replacement sensor, so I'll be ordering one of those to install after the SHVCS is cleared.

Got my car fixed. It just needed some software updates. They reprogrammed the battery control module, battery energy control module, and hybrid powertrain control module 2. They said that they already knew what it was when I brought it in because they had two other Volts in for the same thing last week. They tried to charge me $234 saying that software updates are only covered by the bumper to bumper warranty. After an hour of phone calls between us, the service department and GM everyone finally agreed that those particular software updates are covered by the 8 yr 100k battery system warranty. Just wanted to give that heads up to anyone else who has this problem and stumbles across this thread. Maybe it'll save some time, money, and headache.