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 WarningAirbag Instrument Panel Module Replacement
Airbag Instrument Panel Module Replacement
Callout
Component Name
Warning: Refer to SIR Inflator Module Handling and Storage
Warning.
Warning: Refer to SIR Warning.
Preliminary Procedure
Disable t ...
Cooling System Draining and Filling
Draining Procedure
Warning: To avoid being burned, do not remove the radiator
cap or surge tank cap while the engine is hot. The cooling system will
release scalding fluid and steam under pressure if radiator cap or surge
tank cap is removed while the engine and radi ...
Engine Oil and Oil Filter Replacement
Removal Procedure
Open hood.
Place a drain pan below the vehicle.
Caution: To prevent damage to oil filter cap ensure proper
tool is used. Do not use an open end wrench which may cause damage to
filter cap.
Using a 24mm socket or closed end wrench loosen ...