The vehicle may have a dome lamp.
Move the lever to the following positions:
(Off): Turns the lamp off,
even when a door is
opened.
(Door): Turns the lamp on
whenever a door is
opened.
(On): Turns the dome lamp on.
Instrument Panel Brightness
Entry/Exit LightingChevrolet Cobalt Owners Manual. Underbody Maintenance
Chemicals used for ice and snow removal and dust
control can collect on the underbody. If these are
not removed, corrosion and rust can develop on the
underbody parts such as fuel lines, frame, floor pan,
and exhaust system even though they have corrosion
protection.
At least every spring, flu ...