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 WarningScheduling Service Appointments
When the vehicle requires warranty service, contact your dealer and request an
appointment. By scheduling a service appointment and advising the service consultant
of your transportation needs, your dealer can help minimize your inconvenience.
If the vehicle cannot be scheduled into the service ...
Rear Side Door Check Replacement
Preliminary Procedure
Remove rear side door trim panel. Refer to Rear Side Door
Trim Replacement
Remove the rear side door water deflector. Refer to Rear Side Door Water
Deflector Replacement
Rear Side Door Check Bolt
Caution: Refer to Fastener Caution in the Pre ...
Rear Compartment Lid Emblem/Nameplate Replacement (Bowtie)
Rear Compartment Lid Emblem Assembly
Caution: Refer to Exterior Trim Emblem Removal Caution in the
Preface section.
Procedure
The part and surface should be 21°C (70°F) prior to installation. The
vehicle should remain 21°C (70°F) for
one hour after assembly to allow adhesive to deve ...