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 WarningReclining Seatbacks
Warning
If either seatback is not locked, it could move forward in a sudden stop or
crash. That could cause injury to the person sitting there. Always push and pull
on the seatbacks to be sure they are locked.
To recline a manual seatback:
1. Lift the lever.
If necessary, move the safety b ...
Outside Rearview Mirror Housing Rear Cover Replacement
Outside Rearview Mirror Housing Rear Cover Replacement
Callout
Component Name
Preliminary Procedures
Remove the outside rearview mirror glass. Refer to Outside Rearview Mirror
Glass Replacement.
1
...
SIR Service Precautions
General Service Instructions
Warning: When performing service on or near the SIR components
or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling
and Enabling . Failure to observe the correct procedure could cause deployment
of the SIR components, person ...