Diagnostics
OnStar Vehicle Diagnostics will
perform a vehicle check every
month. It will check the engine,
transmission, antilock brakes, and
major vehicle systems. It also
checks the tire pressures, if the
vehicle is equipped with the Tire
Pressure Monitoring System. If a
diagnostics check is needed
between e-mails, push 
, and
an Advisor can run a check.
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. ...
Muting a Call
During a call, all sounds from inside
the vehicle can be muted so that the
person on the other end of the call
cannot hear them.
To mute a call, press and
then say “Mute Call.”
To cancel m ...
Door Locks
WARNING
Unlocked doors can be dangerous.
Passengers, especially children, can easily open the doors and fall out
of a moving vehicle. When a door is locked, the handle will not open it. T ...