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:
Glass Replacement
If the windshield or front side glass must be replaced, see your dealer to determine
the correct replacement glass. ...
Automatic Headlamp
System
When it is dark enough outside, the
automatic headlamp system turns
on the headlamps at the normal
brightness, along with the taillamps,
sidemarker, parking lamps, and the
instrument panel l ...
Driver Information Center (DIC)
The DIC display is located at the
bottom of the instrument panel
cluster. It shows the status of many
vehicle systems and enables
access to the personalization menu.
The DIC buttons are loc ...