My wife was driving her 09 Cobalt LT with 90k miles on it, and out of nowhere her gauges started goin crazy (going back and forth rapidly), lights dimmed, stereo shut off, and then her car died. She had no idea if there was a battery light or check engine light because all the lights on the dash came on when it started acting up. Her friend disco'd the battery for about 5 mins and the car started and ran just fine and she proceeded to drive 45 miles home with no issues. I was at work when all this happened so I didn't get to see what it did. I checked all connections that I could think of (battery, alternator, ecm, fuse boxes, etc) and found nothing. I can't get the car to duplicate the issue. Anyone have any suggestions of what this could be? I thought it was the alternator at first but the car seems fine now. Oh and approx 6 mos ago she had the crankshaft timing sensor replaced, but other than that, just normal maintenance. Any ideas???