Same thing happened to me...dealer has no clue
This morning the same happened with my 2005 G6 sedan. Car started fine this morning. Ran a few errands, came back to start the car and nothing. Tried turning the key to get it to start several time and nothing. Tried to use the remote start and thats when all lights started flickering and the all electronics had reset. Someone jumped it off and all electronics were reset including the odometer. Just curious as to what may have happened or if there is possibly some computer damage
Any help or info would be greatly appreciated.