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:
Front Display
The front display is located in the instrument panel in the center of the
speedometer and has four bars to provide distance and system information.
The following describes how the UFRPA front ...
Engine Coolant Temperature Gauge
This gauge shows the engine coolant temperature.
If the indicator on the gauge moves towards the shaded area on the thermostat,
it means that the engine coolant has overheated. If the vehicle has ...
3-D Lane Guidance
Some major metropolitan areas may include a 3-D lane guidance feature for highway
exits and junctions. This feature gives you an enhanced representation of the exits
and junctions on the route. ...