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Genuine GM parts have one of these marks:

California Proposition 65 WarningRear Side Door Check Link Replacement
Rear Side Door Check Link Replacement
Callout
Component Name
Preliminary Procedures
Move the window to the full up position.
Remove the rear side door trim panel. Refer to Rear Side Door Trim
Replacement
...
Rear Seat Cushion Removal and Installation
Rear Seat Cushion Removal and Installation
Callout
Component Name
1
Rear Seat Cushion Replacement
Procedure
Release the rear seat center seat belts.
Lift up on the front of the seat cushion at the latch locati ...
Ignition Coil Replacement
Special Tools
EN-6009 Remover and Installer Ignition Coil
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Remove the engine wiring harness guide (1) from the
cylinder head.
Disconnect the ignition coil electrical connector (2).
...