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:
Turn-by-Turn
This display is used for the OnStar or Navigation System Turn-by-Turn
guidance. See OnStar Overview or the navigation manual, if the vehicle has
navigation, for more information. ...
Rear Passenger Cupholders
Pull down on the lid to access the cupholders in the rear floor console.
Vehicles with the rear seat armrest may also contain cupholders. Pull down the
armrest to use the cupholders. ...
Voice Pass-Thru
Voice pass—thru allows access to the voice recognition commands on the cell
phone. See your cell phone manufacturer's user guide to see if the cell phone
supports this feature.
To access contacts ...