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:
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays when the
engine power is being reduced to
protect the engine from damage.
There could be several malfunctions
that might cause this message.
Redu ...
Easy Exit Driver Seat
This allows you to turn the easy exit driver seat feature on or off.
When on, this feature will move the driver seat rearward upon turning the
ignition off and the driver door opened. This may be ...
Passenger Airbag Status Indicator
If the vehicle has the airbag status indicator pictured in the following illustration,
then the vehicle has a passenger sensing system for the right front passenger position.
The passenger airbag ...