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:
Overview
A. (Power/Volume)
B. (Eject)
C. Mark Touch Screen Button
D. (Zoom In) Touch Screen Button
E. Map Scale
F. North Up/Heading Up Symbol
G. No GPS Symbol
H. Full map Touch Screen Button
I. So ...
Exterior Lamps Off Reminder
If a door is open, a reminder chime sounds when the headlamps or parking lamps
are manually turned on and the key is out of the ignition. To turn off the chime,
turn the headlamp switch to off or ...
Controlling a Bluetooth® Device
Bluetooth devices that support AVRCP (Audio/Video Remote Control Profile)
version 1.0 may be able to be controlled by the infotainment system.
Press and release SEEK / SEEK to skip tracks. ...