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:
Contacting Roadside Assistance
Roadside Assistance services
are of no cost to you and available
24 hours a day, 365 days a year.
Costs are only incurred in situations
that exceed the limits of the
program, some of which ar ...
Adaptive Forward Lighting (AFL)
For vehicles with uplevel headlamps, the Adaptive Forward Lighting System
(AFL) adjusts the headlamps to provide greater road illumination in various
driving conditions.
To enable AFL, set the ex ...
Airbag System Messages
SERVICE AIR BAG
This message displays when there
is a problem with the airbag system.
Have the vehicle serviced by your
dealer immediately. See Airbag
Readiness Light for
more information. ...