Alright guys and girls, I recently purchased 2005 cobalt base model coupe. My question is did it previously have a key fob? Could I just get a fob and have it programmed for my car, or would other installations need to be made? The reason I ask is because before I close my door I click the power lock button to lock the doors, and next time I unlock it the alarm goes off. My blazer didn't do this nor did any of my parents cars before. Maybe it's supposed to, but either way I'd like a key fob.