Pretty sure this one encompasses all Cobalts and G5s. I don't remember the bulletin number, (I didn't have the prescence of mind to note it when I printed my work order out at work today, I think it might have been 12045), but there was an open recall for my 2009 Cobalt SS/TC concerning replacement of the ignition lock cylinder for binding or failure that GM just released on 4/18/12.

I plan to get it done soon though because who knows when the sucker is gonna decide it doesn't wanna shut off.