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 WarningDome Lamp Bulb Replacement
Dome Lamp Bulb Replacement
Callout
Component Name
Preliminary Procedure
Remove the windshield header courtesy lamp. Refer to Windshield Header
Courtesy Lamp Replacement
1
Dome Lamp Bulb
...
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 ...
Transmission Mount Replacement - Left Side
Removal Procedure
Remove the battery tray. Refer to
Battery Tray Replacement.
Install the engine support fixture. Refer to
Engine Support Fixture.
Remove and DISCARD the left transmission mount to
bracket bolts (1).
Remove the left transmission mo ...