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:
Easy Entry Seat (Coupe Models Only)
A. Folding Seatback Handle
B. Seat Adjustment Switch
On coupe models, the front seats
can be moved out of the way to
make it easier to get in and out of
the rear seat.
To fold the seatback, ...
Parade Dimming
This feature does not let the
instrument panel display screens
dim during daylight hours while the
ignition is in the ACC/ACCESSORY
or ON/RUN position and the parking
lamps or headlamps are ...
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 ...