I don't have a Cobalt, but the vent control valve that I think they are referring to should be connected to your air filter system. I could be wrong but there is a valve door on my trucks air cleaner ducting that opens and closes. Mine currently is always in the open position beca...
The NHTSA lists five recalls for the 2008 Cobalt, including for ignition switches, fuel pump modules, and electric power steering, so be sure to ask about that, or if you buy it, that’ll be the first thing you want to check.