The driver's seat height adjuster is located on the outboard side of the seat.
To raise the seat, move the lever upward repeatedly until the seat is at the desired height. To lower the seat, move the lever downward repeatedly until the seat is at the desired height.
Chevrolet Cobalt Service & Repair Manual. Catalytic Converter R&R
1.
Raise and support vehicle.
2.
Remove wheel drive shaft heat shield.
3.
Remove Heated Oxygen Sensor (HO2S).
4.
Remove catalytic converter to resonator
pipe nuts, Fig. 1.
...