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.
Chevrolet Cobalt Service & Repair Manual. Diagnosis & Testing
Accessing Diagnostic Trouble Codes
Connect a suitably programmed
scan tool to Diagnostic Link Connector (DLC) and follow manufacturer's instructions.
Wiring Diagrams
Refer to "Wiring Diagrams" on
main menu selection for diagram selections.
Diagnostic ...