Hey guys, I just bought a 2009 cobalt, when I was looking at it I thought the door lock problem was a fuse problem and the fob was a battery. But I checked the fuse for the locks and for the mirrors, and I changed the battery. I can press unlock on the drivers door unlock and it unlocks them. But nothing locks all of them. The fob won't open the trunk or unlock or lock. But the panic button works. When I press lock or unlock on the fob it stops the panic button. The passenger side unlock button doesn't work either. Can anyone help me out. I'm gonna check the wiring for the door switches this week, but that probably won't explain the fob.