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 WarningEngine Cooling System Messages
A/C OFF DUE TO HIGH ENGINE TEMP
This message displays when the engine coolant becomes hotter than the normal
operating temperature.
To avoid added strain on a hot engine, the air conditioning compressor automatically
turns off.
When the coolant temperature returns to normal, the air condition ...
OnStar Additional Information
Transferring Service
Press to request account transfer
eligibility information. The Advisor can assist in canceling or removing account
information. If OnStar receives information that vehicle ownership has changed,
OnStar may send a voice message to the vehicle, requesting updated account i ...
Interior Lighting
Dome Lamps
The dome lamp controls are located in the headliner.
: Press to turn the lamps off, even
when a door is open.
: Press to turn the lamps on automatically
when a door is opened.
: Press to turn on the dome lamps.
Reading Lamps
The reading lamps are located in the overhead con ...