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:
Brake Assist
This vehicle has a brake assist feature designed to assist the driver in
stopping or decreasing vehicle speed in emergency driving conditions. This
feature uses the stability system hydraulic brake ...
Manual Liftgate Operation
To unlock the liftgate, press on
the power door lock switch or press
on the Remote Keyless Entry (RKE) transmittertwice, see Remote Keyless Entry (RKE)
System Operation .
Press the touc ...
Tire Terminology and
Definitions
Air Pressure: The amount of
air inside the tire pressing
outward on each square inch
of the tire. Air pressure is
expressed in kPa (kilopascal)
or psi (pounds per square inch).
Accessory We ...