My car door won't open.
You didn’t say whether the problem is with the mechanical portion of the door, or the electronics. Electronic door locks may fail as a result of a bad actuator, switch, or wiring problem. However, Cobalts like yours are known for having problems with the mechanical door lock mechanism. The striker plate, which holds the door in place, gets pushed out of alignment. A trained professional, such as one from YourMechanic, can inspect your door and make the appropriate repairs to have it fixed.
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