See also:

Ignition Positions (Keyless Access)
The vehicle has an electronic keyless ignition with pushbutton start. Pressing the button cycles it through three modes: ACC/ACCESSORY, ON/RUN/START, and Stopping the Engine/OFF. The transmitter ...

OnStar® Steering Wheel Controls
Your vehicle may have a Talk/Mute button that can be used to interact with OnStar® Hands-Free Calling. On some vehicles, you may have to hold the button for a few seconds and give the command †...

Reducing Speed While UsingCruise Control
Press in the set button at the end of the lever until you reach the desired speed, then release it. Each time you do this, you will go about 1 mph (1.6 km/h) slower. ...