Recently bought an 2007 G6 3.9L and has been nothing but trouble in the week I've had it. Stopping at a light or in traffic the car will shoot the RPM's up to 3500 and try to take off. The dealer I bought it from says he changed the battery and that's why I'm having the issue and he did an "idle relearn" to the car. Still doing it but not as bad. Now today while driving the TC light came on for 10 seconds then shut off.