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Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningLighting
Specifications
Headlights/Daytime Running Lights (DRL) Schematics
Interior Lights Schematics
...
Accident With Side Air Bag Module Deployment - Component Replacement and
Inspections
After a collision involving left/right side air bag module deployment,
replace the following components.
Left/right inflatable restraint side impact sensors on the side of the
impact.
Left/right inflatable restraint roof rail module on the side of the
impact.
Inflatable restraint sen ...
Installation Procedure
Create 5 x 18 mm (4/16 x 11/16 in) slots for MIG-brazing
(1).
Clean and prepare the attaching surfaces for spot welding and brazing.
Note: In MIG-brazing areas 50 mm (2 in) must be kept clear
of structural adhesive.
Apply structural adhesive to all attaching surfaces ...