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:
Windshield Washer Fluid
What to Use
When you need windshield washer fluid, be sure
to read the manufacturer’s instructions before
use. If you will be operating your vehicle in an area
where the temperature may fall bel ...
Headlamp Aiming
Headlamp aim has been preset and should need no further adjustment. If the vehicle
is damaged in a crash, the headlamp aim may be affected. If adjustment to the headlamps
is necessary, see your de ...
Air Quality Sensor
This will allow you to select whether
the system will operate at high or
low sensitivity. Only vehicles with
the dual zone climate control will
have this option.
Press SELECT when Air Quality ...