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 WarningAudible Warnings Description and Operation
The audible warnings alert the driver of a system concern or a critical vehicle
condition. The radio generates the audible warnings through the speakers. The radio
receives audible warning requests via the serial data circuit. If the radio receives
multiple audible warning requests, the warnin ...
Center Pillar Reinforcement Replacement
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair
Warning.
Warning: Refer to Glass and Sheet Metal Handling Warning.
Note: The center pillar upper stiffener is made of Dual Phase
Steel and should be replaced only at ...
Front Disc Brake Mounting and Hardware Inspection
Warning: Refer to Brake Dust Warning.
Inspect the fluid level in the brake master cylinder reservoir.
If the brake fluid level is midway between the maximum-full point and the
minimum allowable level then no brake fluid needs to be removed from the reservoir
before proceed ...