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 WarningWindows
Warning
Never leave a child, a helpless adult, or a pet alone in a vehicle, especially
with the windows closed in warm or hot weather. They can be overcome by the extreme
heat and suffer permanent injuries or even death from heat stroke.
The vehicle aerodynamics are designed to improve fuel ...
Airbag System Check
The airbag system does not need regularly scheduled maintenance or replacement.
Make sure the airbag readiness light is working. See Airbag Readiness Light.
Caution
If an airbag covering is damaged, opened, or broken, the airbag may not work
properly. Do not open or break the airbag coverings. ...
Outside Rearview Mirror Housing Replacement
Outside Rearview Mirror Housing Replacement
Callout
Component Name
Preliminary Procedures
Remove the outside rearview housing cover. Refer to Outside Rearview
Mirror Housing Rear Cover Replacement.
Remove the outside rear ...