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:
Passenger Airbag Status Indicator
If the vehicle has the airbag status indicator pictured in the following illustration,
then the vehicle has a passenger sensing system for the right front passenger position.
The passenger airbag ...
Manual Operation
(Fan Control): Press the up or down
arrows to increase or decrease the fan speed Pressing this button when the system
is off will turn the system on.
Pressing either arrow while using automatic ...
Storing a Flat or Spare Tire and Tools
Storing a jack, a tire, or other equipment in the passenger compartment of the
vehicle could cause injury. In a sudden stop or collision, loose equipment could
strike someone. Store all these in t ...