Have you found out what could be your problem with the traction control and your brake lights?? I was told it you be a sensor onthe tranny....
2007 Chevrolet Cobalt Electrical System Problem Back Light Switch Location this is a link where it could be. I'm still cheking it out polly gona take it to the dealer and get ripped off. I also have a bad tranny...in which I know they are not gona fix....if you had any luck please let me know