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:
Arming the System
To arm the system:
1. Open the door.
2. Lock the door with the
transmitter. The security light
should come on and stay on.
3. Close all doors. The security
light should go off after about
3 ...
CD/DVD Messages
If Disc Read Error appears on the display and/or the CD/DVD comes out, it could
be for one of the following reasons:
If a CD was inserted with an invalid or unknown format.
If a DVD is not fro ...
Auxiliary Devices (Radio with CD)
The optional AUX input allows portable devices to connect to the vehicle
using the 3.5mm (1/8 in) input jack, the USB port, or Bluetooth® wireless
technology, if equipped.
Portable devices are co ...