1/29/2015 no crank..displayed message "service stab sys traction fault" had it towed to dealer and they replaced ecu repair cost was going to be more than$500.00 until i contacted gm customer service it was then reduced to $100.00. mileage was 33478. this was three months ago. and the no crank problem continued however turned key back to off for a few seconds then vehicle would.. today had this problem but when it started engine misfire and engine light came on along with the message "service stab sys traction fault reduced power". was able to limp home at 25 mph once there shut engine of then restarted seemed to be running ok then but the check engine light is now on. i have to take it to the dealer in the morning if it will start. i also contacted gm customer service again. mileage now is 39650