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:
Radio Frequency Identification (RFID)
RFID technology is used in some vehicles for functions such as tire pressure
monitoring and ignition system security, as well as in connection with
conveniences such as key fobs for remote door lock ...
Second Row Passenger Belt Reminder Light
When the engine is started and the Trip/Fuel display is chosen, three gray
safety belt symbols come on and stay on for several seconds on the top of the
Driver information Center (DIC) to remind ...
StabiliTrak® System
The vehicle has a traction control system that limits wheel spin and the StabiliTrak
system that assists with directional control of the vehicle in difficult driving
conditions. Both systems turn ...