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:

Vehicle Care
California Proposition 65 WarningFuel and Evaporative Emission Pipe Warning
Warning: In order to reduce the risk of fire and personal injury observe
the following items:
Replace all nylon fuel pipes that are nicked, scratched or damaged
during installation, do not attempt to repair the sections of the
nylon fuel pipes
Do not hammer directly on the fuel harness ...
Shock Absorber Replacement
Removal Procedure
Raise and suitably support the vehicle. Refer to Lifting and
Jacking the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation.
Support the rear axle with a tall jack stand near the shock absorber.
Remove the upp ...
Instrument Panel Outer Air Outlet Replacement - Left Side
Preliminary Procedure
Remove instrument panel lower trim pad cover - left side. Refer to
Instrument Panel Lower Trim Pad Cover Replacement.
Remove instrument panel cluster trim plate. Refer to Instrument Panel
Cluster Trim Plate Replacement.
Remove instrument panel cluster lo ...