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:

California Proposition 65 WarningRear License Plate Lamp Bulb Replacement (Sedan)
Rear License Plate Lamp Bulb Replacement
Callout
Component Name
Preliminary Procedure
Remove the rear license plate lamp housing. Refer to Rear License Plate
Lamp Replacement.
1
License Plate La ...
Rear Side Door Window Switch Replacement
Rear Side Door Window Switch Replacement
Callout
Component Name
Preliminary Procedure
Remove the rear side door window switch bezel. Refer to Rear Side Door
Window Switch Bezel Replacement.
1
Re ...
Transmission Fluid Pump, Front Differential Carrier Baffle, and Front Differential
Ring Gear Removal (6T30)
Transmission Fluid Pump, Front Differential Carrier Baffle, and Front
Differential Ring Gear Removal
Callout
Component Name
1
Front Differential Carrier Baffle Bolts M6 x 25 (Qty: 2)
...