While driving my 2005 Cobalt it stalls out with no warning. The radio flashes locked across the screen, just as the car is about to shut off. I have taken the car back to the dealership on three different occasions, and they keep telling me they can't find the problem. This has happened probably 15 times or more since I leased the car back in July. I'm really afraid that this might cause an accident. At this time, I am going through the process to have General Motors by the car back.

- Detroit, MI, USA

We purchased our 2005 Chevrolet Cobalt in mid December. In the middle of January we noticed that the air conditioner was not blowing cold air. Dealership replaced the air conditioner compression valve. Approximately one week later the vehicle began to display the "check engine" light and read "power less reduced" then, we began to have difficulty accelerating. The gas pedal became stiff. The dealearship replaced the air conditioner compression valve once again. Again the problem surfaced about a week later. The same part was replaced once again, and an appointment was made for the following Tuesday to drop the vehicle off for further investigation. Dealership discovered a faulty wiring harness causing the problem. We were then told that this was an engineering problem with the vehicle. Proceedings are underway to replace the vehicle with another car.

- Acton, CA, USA