Hazard Warning Flashers
The hazard warning flashers warn others.
They also let police know you have a problem.
Your front and rear turn signal lamps will flash on and off.

The hazard warning flasher button is located on top of the steering column.
The hazard warning flashers work no matter what ignition position the key is in, and even if the key is not in the ignition.
Press the button to make the front and rear turn signal lamps flash on and off. Press the button again to turn the flashers off.
When the hazard warning flashers are on, your turn signals will not work.
See also:
Cold Temperature Operation
If in an area of extreme cold, where the temperature
falls below −20°F (−29°C), use either an SAE 5W-30
synthetic oil or an SAE 0W-30 engine oil. Both provide
easier cold starting ...
Global Positioning
System (GPS)
• Obstruction of the GPS can
occur in a large city with tall
buildings; in parking garages;
around airports; in tunnels,
underpasses, or parking
garages; or in an area with very
dense tr ...
Potential Issues
Some OnStar services are disabled
after five days. OnStar cannot
perform Remote Door Unlock or
Stolen Vehicle Assistance after the
vehicle has been off continuously
for five days. After five ...
