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 
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Advisor can run a check.
See also:
StabiliTrak® System
The StabiliTrak system assists with directional control of the vehicle in
difficult driving conditions.
The system is on when the vehicle is started.
- To turn off both Traction Control and Sta ...
CD/DVD Player
The infotainment system's CD/DVD
player can play audio discs and
MP3 discs.
Discs that are 8 cm (3 in) in
diameter will not work in the
CD/DVD player.
The CD/DVD player does not
support th ...
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 ...