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. Fuel Pump, Replace
Removal
1.
Relieve fuel system pressure as outlined
under "Precautions."
2.
Drain fuel tank.
3.
Raise and support vehicle.
4.
Disconnect connector and remove fuel
...