For service and parts needs, visit your dealer/retailer.
You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Accessories and ModificationsChevrolet Cobalt Service & Repair Manual. Wheel Bearing, Replace
Front
1.
Raise and support vehicle using suitable
lift.
2.
Remove tire and wheel assemblies.
3.
Remove drive axle nut, Fig.
1.
4.
Remove brake caliper and rotor assembly.
...