One problem related to power door locks not working has been reported for the 2009 Chevrolet Cobalt. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Chevrolet Cobalt based on all problems reported for the 2009 Cobalt.
Power door locks are defective. My Cobalt locks go up and down by themselves the switches or fob will work. By doing some research online hundreds of people seem to have this problem. It is defectove and general motors should issue a recall about this.