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 WarningBattery
Refer to the replacement number on the original battery label when a new battery
is needed.
WARNING
Battery posts, terminals, and related accessories contain lead and lead compounds,
chemicals known to the State of California to cause cancer and reproductive harm.
Wash hands after handling.
...
Fuel 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 ...
Installation Procedure
Install NEW stabilizer shaft insulators (1) to stabilizer shaft (2) so
that the slit in the insulator is facing the rear of the vehicle.
Install the insulator c 2. lamp to the insulator:
2.1. Position the clamp (2) over on the insulator.
2.2. Use two M8 bolts (1, 3) with 40 ...