2001 Pontiac Grand AM engine problems

Car started shutting off while being driven on numerous occasions. Car was evaluated by GM dealer and another independent auto repair shop, neither could determine why car was shutting off, GM dealer technician stated possible ignition switch problem on 11/22/2010. On 12/24/2011, the pontiac grand am 2001, was being driven and ignition shut off causing the car to hit an unoccupied parked truck. Car lost power steering and could not avoid the accident. Car flipped on its top, injuring the driver of the car.

Three big issues with this car: 1) the worst-I've had problems with the security system shorting three times. Each time, the car turns over but will not start. The security light flashed twice, but did not come on the third time. The first time the dealer adjusted the system (whatever that means) which was covered under warranty. The second time (two months later), my car would not start at 2am outside of a bar, so I had to have it towed. This time the whole system was replaced under my warranty.