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:
How to Add Coolant to the
Surge Tank
WARNING!
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engin ...
Turning the System On and Off
The system can be disabled through
the Driver Information Center (DIC).
See “Parking Assist” under Driver
Information Center (DIC) for more information.
URPA defaults to the on setting
each ti ...
Passenger Sensing System
If the vehicle has the passenger airbag status indicator pictured in the following
illustration, then the vehicle has a passenger sensing system for the right front
passenger position. The passeng ...