We live in the Milwaukee area and regularly drive our '17 Hybrid to Colorado, Georgia, New England, etc. We bought it to replace our dear, departed '11 Golf TDI as our "road trip" car. The MH has 36,640 miles on it right now. Last Monday, it had 35,670 miles on it, so I took it to our local dealer and negotiated a GM Platinum 0-deductable extended warranty before the car fell out of its original warranty, which it was about to do on a trip to Atlanta two days later. Got to Atlanta no problem (~800 miles), then drove around the area for a few days and left to return home on Sunday morning. After about 20 minutes, while driving on the highway, the drive cut out, alarms went off, and "shift to park" appeared in the display. After safely coasting to a stop off highway, tried everything to revive it, but no-go. Car turns on, cluster lights up normal (with the addition of a CEL), while the power flow display in the center of the dash is completely greyed-out. I called the Volt/MH roadside assistance number and they got us a flatbed in less than an hour. He took us to the nearest dealer (in Acworth, GA), where we were forced to dump/leave the car at the locked front gate. I called them first thing Monday morning to let them know who's car it was, and they got started on it. I stopped back in the late afternoon, and the tech was still scratching his head, saying that there was definitely more going on than just a shot 12V battery. So, we're stuck waiting at an understanding relative's house while they figure it out. I just found a couple of (related?) threads over on the Volt forum...one, a recent GM recall for power loss, the other requiring a trans-axle replacement!
The car has been terrific until now. I sure hope they figure it out quickly, it was supposed to go out to the east coast in a few weeks.