This issue first started last year, end of 2012. The shop I brought it to is a certified Pontiac dealer. They have no idea how to fix the vehicle. It shuts down while warming up, or while driving. The lights, radio will stay on, but the "check engine/battery light" is on. It has been in and out of the shop numerous times. It stopped shutting down in November and was just "working". Now end of March 2013, it all started again. The shop has done everything they can think of, and the issue is still happening. Pontiac/GM customer service has been NO help what so ever with this process and won't work anything out. I need to know if anyone else has experienced this intermittent shutting down.