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. Push 
and request a vehicle diagnostic check. If the light appears clear (no light appears), your OnStar subscription has expired and all services have been deactivated.
Push to confirm that the OnStar equipment is active.
See also:
Reading Lamps
There are front and rear reading
lamps.
The front reading lamps are located
in the overhead console.
The rear reading lamps are located
in the headliner.
or
: Press to turn each lamp
...
Other Warning Devices
If you carry reflective triangles, you can set them up
at the side of the road about 300 feet (100 m)
behind your vehicle. ...
Cooling System
The cooling system allows the engine to maintain the correct working temperature.
A. Engine Cooling Fan (Out of View)
B. Engine Coolant Surge Tank and Pressure Cap
WARNING
An electric engine c ...