Traction control light kicks on and the car jersey around power steering goes out and it shifts hard. Once it warms up, you can turn the car off. Then start it back up and it runs fine.?
Mine did something like that when it needed a new battery. Apparently the electrical system is very sensitive and having a weak battery in the system caused erratic malfunctions of various electrical components. I'd get it checked, or, if its the original battery just replace it. When I changed mine all my weird electrical problems went away.
Search Chevrolet Cobalt Questions
Chevrolet Cobalt Experts