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:
U-Rail
For vehicles with a u-rail system, the fence can be moved to different
positions on the u-rail track to secure cargo.
Push both adapter buttons to move the adapters (B) on the straight par ...
Average Vehicle Speed
The Average Vehicle Speed display shows the average speed of the vehicle in
kilometers per hour (km/h) or miles per hour (mph).
This average is calculated based on the various vehicle speeds recor ...
Antilock Brake System (ABS)
This vehicle has the Antilock Brake System (ABS), an advanced electronic
braking system that helps prevent a braking skid.
When the engine is started and the vehicle begins to drive away, ABS chec ...