The vehicle has a battery saver feature designed to protect the vehicle's battery.
When any interior lamp is left on and the ignition is turned off, the battery rundown protection system automatically turns the lamp off after 20 minutes.
This prevents draining of the battery.
Chevrolet Cobalt Service & Repair Manual. Precautions
Air Bag Systems
Refer to "Air Bag System Precautions"
on main menu selection for "Precautions."
Battery Ground Cable
Prior to service, disconnect battery
ground cable and isolate as required.
Electrical Service
Because of the electronic ...