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:
Initial Drive Information
This section provides a brief overview about some of the important features that
may or may not be on your specific vehicle.
For more detailed information, refer to each of the features which can b ...
Entry Lighting
The headlamps, taillamps, license plate lamps, back—up lamps, dome lamps,
and most of the interior lights turn on briefly, when is pressed on the Remote
Keyless Entry (RKE) transmitter, or when the ...
Power Liftgate Operation
On vehicles with a power liftgate, the switch is on the overhead console.
The vehicle must be in P (Park) to use the power feature. The taillamps will
flash and a chime will sound when the power li ...