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. Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
The rear window defogger only works when the ignition
is in ON/RUN.
(Rear): Press to turn the
rear window defogger on
or off. Be sure to clear as much snow from the rear
window as possible. An indicator light c ...