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 WarningSafety System Check
Now and then, check that the safety belt reminder light, safety belts, buckles,
latch plates, retractors, and anchorages are all working properly.
Look for any other loose or damaged safety belt system parts that might keep
a safety belt system from doing its job. See your dealer to have it rep ...
Rear Side Door Stationary Window Replacement
Preliminary Procedures
Remove the rear side door trim panel. Refer to Rear Side Door Trim
Replacement.
Remove the rear side water deflector. Refer to Rear Side Door Water
Deflector Replacement.
Remove the rear door window outer sealing strip. Refer to Rear Side Door
Window ...
Instrument Panel Assembly Replacement
Preliminary Procedures
Disable the SIR system. Refer to SIR Disabling and Enabling
Remove the front floor console assembly. Refer to Front Floor Console
Replacement.
Remove the radio assembly. Refer to Radio Replacement.
Remove the driver information display bezel. Refer ...