The hydraulic clutch linkage in your vehicle is self-adjusting. This system does not have its own reservoir. It receives fluid from the brake master cylinder reservoir.
See Brakes on for more information.
Chevrolet Cobalt Service & Repair Manual. Engine, Replace
Removal
1.
Open and support hood. Install suitable
protective covering over fenders. Mark upper hood hinge location
to hood with suitable grease pencil. Remove hood with assistance.
2.
Remove air cleaner resonator to accelerator
...