The headlamps and parking lamps are activated 15 seconds after the windshield wipers are turned on.
For this feature to work, automatic lighting must be enabled. See Headlamps for additional information.
When the ignition is turned off, the wiper-activated headlamps will immediately turn off. They also turn off 15 seconds after the windshield wiper control is turned off.
Headlamps
Headlamps on ReminderChevrolet Cobalt Owners Manual. Control of a Vehicle
The following three systems help to control the vehicle
while driving — brakes, steering, and accelerator. At
times, as when driving on snow or ice, it is easy to ask
more of those control systems than the tires and road
can provide. Meaning, you can lose control of the
vehicle. See Traction ...