Chevrolet 2007 Cobalt Owner's Manual page 70

If your vehicle has a roof-mounted side impact
airbag for the driver and the person seated directly
behind the driver, it is located in the ceiling
above the side windows.
70
If your vehicle has a roof-mounted side impact
airbag for the right front passenger and the person
directly behind that passenger, it is located in
the ceiling above the side windows.