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 WarningInterior Trim and Paneling
Specifications
Front Side Door Window Switch Bezel Replacement
Preliminary Procedure
Remove the front side door trim. Refer to Front Side Door Trim Replacement.
Front Side Door Window Switch Bezel Screw (Qty: 8)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
...
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
...
Power Windows
WARNING
Children could be seriously injured or killed if caught in the path of a closing
window. Never leave keys in a vehicle with children. When there are children in
the rear seat, use the window lockout button to prevent operation of the windows.
Press the switch down to open the window. ...