See also:

Using Voice Recognition
To use voice recognition, press the button located on the steering wheel. Use the commands below for the various voice features. For additional information, say "Help" while you are in a ...

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Checking Brake Fluid
Check brake fluid by looking at the brake fluid reservoir. See Engine Compartment Overview  . The fluid level should be above MIN. If it is not, have the brake hydraulic system checked to ...