I backed out of my icy driveway and onto the clear, dry road. set my cruise control to 48mph and after about 30 seconds, my traction control and service engine lights came on with an error message that said "service stabilitrak" and my cruise control turned off. i closed the stabilitrak message, the traction control light turned off after about 30 seconds, and the service engine light turned off shortly after. but my cruise control still wont engage. i've turned the vehicle off and on and it still isnt working. it seems that a lot of different gm vehicles have experienced this problem, and the dealership has fixed it in several different ways. i read on a forum that someone had the issue and the gm dealership said there was an issue with the amount of ethanol in the gasoline. i happened to have filled up my tank the night before with regular unleaded from my local speedway. not sure of that could have been connected.