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:
Door Ajar Messages
DRIVER DOOR OPEN
This message displays and a chime sounds if the driver door is not fully closed
and the vehicle is shifted out of P (Park). Stop and turn off the vehicle, check
the door for obst ...
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 Canada. ...
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 Overview. ...