The lamps inside the vehicle will go on when any door is opened. These lamps fade out about 20 seconds after all of the doors have been closed or when the ignition is turned to ON/RUN. These lamps will also go on when pressing the trunk release, unlock symbol, or the horn symbol button on the Remote Keyless Entry System (RKE) Transmitter.
After the key is removed from the ignition, the lamps inside the vehicle stay on for about 20 seconds to provide an illuminated exit.
Dome Lamp
Mirror Reading LampsChevrolet 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 ...