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 WarningService Prior to Assembly
The importance of cleanliness during assembly cannot be overstated. Dirt or debris
will cause engine damage. An automobile engine is a combination of many machined,
honed, polished and lapped surfaces with minor tolerances. When any internal engine
parts are serviced, care and cleanliness are ...
New Vehicle Break-In
Notice: The vehicle does not need an elaborate break-in. But it will
perform better in the long run if you follow these guidelines:
Do not drive at any one constant speed, fast or slow, for the first
805 km (500 mi). Do not make full-throttle starts. Avoid downshifting t ...
Camshaft Sprocket Replacement
Special Tools
EN-6340 Camshaft Adjuster Locking Tool
EN-6628–A Camshaft Locking Tool
EN-45059 Angle Meter
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Open the hood.
Remove the air cleaner housing. Refer to Air Cleaner Assembly Replacement. ...