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:
Rocking Your Vehicle to Get It Out
Turn the steering wheel left and right to clear the area around the front wheels.
Turn off any traction or stability system. Shift back and forth between R (Reverse)
and a forward gear, spinning t ...
Passive Door Unlock
If the vehicle has the RKE system, this feature allows you to select which
doors will automatically unlock when you open the driver door with the RKE
transmitter present.
Press the MENU/SELECT kn ...
Bluetooth Controls
Use the buttons located on the
steering wheel to operate the
in-vehicle Bluetooth system.
See Steering Wheel Controls for more information.
(Push To Talk): Press to
answer incoming calls, con ...