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:
Express Window Anti-Pinch Override
WARNING!
If express override is activated,
the window will not reverse
automatically. You or others could
be injured and the window could
be damaged. Before you use
express override, make s ...
Alpha-Numeric Keyboard
Letters of the alphabet, symbols, punctuation, and numbers, when available, displays
on the navigation screen as an alpha or numeric keyboard. The alpha keyboard displays
when the system requires ...
Replacing Airbag System Parts after a Crash
WARNING
A crash can damage the airbag systems in the vehicle. A damaged airbag system
may not work properly and may not protect you and your passenger(s) in a crash,
resulting in serious inj ...