Emergency
With Automatic Crash Response, the built-in system can automatically connect to help in a crash even if you cannot ask for it.
Push 
to connect to an Emergency
Advisor. GPS technology is used to identify the vehicle location and can provide
critical information to emergency personnel. The Advisor is also trained to offer
critical assistance in emergency situations.
See also:
SERVICE SIDE BLIND ZONE
ALERT SYSTEM
If this message appears, both SBZA
displays will remain on indicating
there is a problem with the SBZA
system. If these displays remain on
after continued driving, the system
needs service. ...
Fuel System Messages
FUEL LEVEL LOW
This message displays and a chime sounds if the fuel level is low. Refuel as
soon as possible. See Fuel Gauge and Fuel for more information.
TIGHTEN GAS CAP
...
OnStar®
If equipped, this vehicle has a
comprehensive, in-vehicle system
that can connect to a live Advisor
for Emergency, Security, Navigation,
Connection, and Diagnostic
Services. See OnStar Overv ...