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. Valve Spring Replace
This procedure is designed to
replace valve spring while head is attached to engine.
1.
Install a suitable flywheel holding
tool in order to prevent crankshaft rotation.
2.
Remove applicable spark plug from cylinder
...