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:
Mirror Adjustment
Exterior
Controls for the outside power
mirrors are on the driver door.
To adjust each mirrors:
1. Press (A) or (B) to select the
driver or passenger side mirror.
2. Press the arrows on the ...
Different Size Tires and
Wheels
If wheels or tires are installed that
are a different size than the original
equipment wheels and tires, vehicle
performance, including its braking,
ride and handling characteristics,
stabil ...
Battery Power Protection
This feature helps to prevent
battery drain if accessory lamps
are left on. If accessory lamps such
as the vanity mirror, cargo, reading,
console, or glove box are left on,
they automaticall ...