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:
Anti-theft Alarm System Message
SERVICE THEFT DETERRENT SYSTEM
This message displays when there is a problem with the theft-deterrent system.
The vehicle may or may not restart so you may want to take the vehicle to your dealer
...
Making Turns
Notice: Making very sharp turns while trailering could cause the trailer
to come in contact with the vehicle. The vehicle could be damaged. Avoid making
very sharp turns while trailering.
When tu ...
Bluetooth®
For vehicles with a Bluetooth system, it allows users with a Bluetooth-enabled
cell phone to make and receive hands-free calls using the vehicle’s audio system
and controls.
The Bluetooth-enabled ...