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:
Magnetic Ride Control
The V-Series reaches elite levels of road-holding performance, but also
maintains the poise of a luxury car in "regular" driving conditions. The
technical enabler of that dual-mode drivi ...
OnStar®
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect
to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic
Services. See OnStar Overview&nb ...
Information Displays
Driver Information Center (DIC)
The DIC displays information about the vehicle. It also displays warning
messages if a system problem is detected. See Vehicle Messages for more
information. All m ...