Danger, Warnings, and Cautions
Warning messages found on vehicle labels and in this manual describe hazards and what to do to avoid or reduce them. Danger indicates a hazard with a high level of risk which will result in serious injury or death. Warning or Caution indicates a hazard that could result in injury or death.
WARNING
These mean there is something that could hurt you or other people.
Notice: This means there is something that could result in property or vehicle
damage. This would not be covered by the vehicle's warranty.

A circle with a slash through it is a safety symbol which means “Do Not,” “Do not do this,” or “Do not let this happen.”
See also:
Running the Vehicle While Parked
It is better not to park with the engine running. But if you ever have to, here
are some things to know.
WARNING
Idling a vehicle in an enclosed area with poor ventilation is dangerous. Engine
...
Your Responsibility
Increase the volume of the radio if the OnStar advisor
cannot be heard.
If the light next to the OnStar buttons is red, the system
may not be functioning properly. Press
and request
a vehicle ...
Control of a Vehicle
Braking, steering, and accelerating are important factors in helping to control
a vehicle while driving. ...
