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

Vehicle Care
California Proposition 65 WarningRemoval Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling
and Enabling.
Disconnect the negative battery cable. Refer to ...
Rear Wheel Bearing and Hub Replacement (Disc Brake)
Special Tools
EN 45059 Torque Angle Sensor Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and suitably support the vehicle. Refer to Lifting and
Jacking the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
...
Installation Procedure
Drill 8 mm (5/16 in) for plug welding along the edges of the front
wheelhouse front panel as noted from the original panel.
Drill 8 mm (5/16 in) for plug welding where front wheelhouse front panel
and front wheelhouse overlap.
Clean and prepare the attaching surfaces f ...