Do not pump the brakes. Just hold the brake pedal down firmly and let antilock work. A slight brake pedal pulsation might be felt or some noise noticed, but this is normal.
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.
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