Any stone chips, fractures or deep scratches in the finish should be repaired right away. Bare metal will corrode quickly and may develop into major repair expense.
Minor chips and scratches can be repaired with touch-up materials available from your dealer/retailer.
Larger areas of finish damage can be corrected in your dealer's/retailer's body and paint shop.
Chevrolet Cobalt Service & Repair Manual. Component Replacement
Master Cylinder
1.
On Vibe models, remove air filter
hose clamp and hose from throttle body.
2.
On all models, disconnect fluid
level sensor retainer and electrical connector.
3.
Drain master cylinder ...