Windshield wiper blades should be inspected for wear or cracking. See Scheduled Maintenance for more information on wiper blade inspection.
Replacement blades come in different types and are removed in different ways. For proper type and length, see Maintenance Replacement Parts.
Here is how to remove the wiper blades: 1. Pull the windshield wiper arm away from the windshield.
2. Push the release lever and slide the wiper assembly toward the driver side of the vehicle.
3. Install a new blade by reversing Steps 1 and 2.
Chevrolet Cobalt Owners Manual. Door Locks
To lock the driver door from outside the vehicle, turn the
key clockwise. Turn it counterclockwise to unlock.
The Remote Keyless Entry (RKE) transmitter can also
be used to lock or unlock the doors.
From the inside, use the manual lock knobs on each
door or use the power door locks.
Power Door ...