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 WarningSafety System Check
Now and then, check that the safety belt reminder light, safety belts, buckles,
latch plates, retractors, and anchorages are all working properly.
Look for any other loose or damaged safety belt system parts that might keep
a safety belt system from doing its job. See your dealer to have it rep ...
Tire Rotation
Tires should be rotated every 12 000 km (7,500 mi).
Tires are rotated to achieve a uniform wear for all tires. The first rotation
is the most important.
Anytime unusual wear is noticed, rotate the tires as soon as possible, check
for proper tire inflation pressure, and check for damaged tires ...
Starting the Engine
Place the transmission in the proper gear.
Notice: If you add electrical parts or accessories, you could change
the way the engine operates. Any resulting damage would not be covered by the vehicle
warranty.
Automatic Transmission
Move the shift lever to P (Park) or N (Neutral). The engine wi ...