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. Wiring Diagrams
Refer to Figs. 1
through 3 for wiring diagrams.
Wire Color Code Identification
Color Code
Wire Color
BK
Black
BN
Brown
D-
Dark
...