See also:

OnStar Steering Wheel Controls
This vehicle may have a Talk/Mute button that can be used to interact with OnStar Hands-Free calling. See Steering Wheel Controls  for more information. On some vehicles, the Talk button can be ...

Starting the Vehicle Messages
JUMP START ACTIVE WAIT TO START This message displays while performing an on-board jump start of the vehicle. See “Jump Starting (On-board with eAssist Only)” for more information. JUM ...

STEP ON BRAKE TO RELEASE PARK BRAKE
This message is displayed if you attempt to release the electric parking brake without the brake pedal applied. See Parking Brake for more information. ...