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:
Daytime Running
Lamps (DRL)
Daytime Running Lamps (DRL) can
make it easier for others to see the
front of your vehicle during the day.
Fully functional daytime running
lamps are required on all vehicles
first sold in Ca ...
Adaptive Forward Lighting (AFL) Light
This light should come on briefly as the vehicle is started. If it does not
come on, have the vehicle serviced by your dealer.
This light comes on solid when there is a problem with the Adapti ...
Rear Vision Camera (RVC)
The vehicle may have a Rear Vision Camera (RVC) system. Read this entire
section before using it.
The RVC system can assist the driver when backing up by displaying a view of
the area behind the ...