Car has gone through 4 valve covers in 5 moths. its a known problem and gm has and will not extend warranty.
Came to a stop at a controlled signal light and my car died and refused to start. i had to get help to push my car out of the traffic. after several tries and 30 minutes later the car started. at least 40 other people have reported this same issue to car complaints.com and lemon laws.com