If your vehicle has power door locks, it will have this feature. If you press the power door lock switch when the key is in the ignition and any door is open, all the doors will lock and the driver's door will unlock.
Be sure to remove the key from the ignition when locking your vehicle.
The lockout protection can be overridden by pressing and holding the power door lock in the lock position for three seconds.
Rear Door Security Locks (Sedan)
TrunkChevrolet Cobalt Owners Manual. Delayed Locking
If your vehicle has power locks, it will have the
delayed locking feature.
This feature will delay the actual locking of the doors
for up to five seconds when the power door lock switch
or remote keyless entry transmitter is used to lock
the vehicle.
If any door is open when locking the vehicl ...