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:
Timer
Can be used to measure time.
For example, timing how long it
takes to travel from one point to
another. To access the timer,
press the trip/fuel button until Timer
00:00:00 displays.
To turn ...
Scrolling the Map
Press anywhere on the map screen and the scroll symbol appears. Use this feature
to scroll across the map.
Move your finger in any direction on the map screen and the map continues to
scroll in ...
Adding Destinations to the Address Book
There are two ways to add a destination to the address book:
To add the current vehicle position to the address book, press the Mark
screen button from the map screen. The system automatically ...