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:
Universal Remote System
The Universal Home Remote
System allows for garage door
openers, security systems, and
home automation devices to be
programmed to work with these
buttons in the vehicle.
See Universal Re ...
PARK BRAKE SET
For vehicles with the electric parking
brake, this message displays when
the parking brake has been applied
to the set position. See the electric
parking brake information under
Parking Brak ...
Tachometer
The tachometer displays the
engine speed in revolutions per
minute (rpm).
Notice: If the engine is operated
with the tachometer in the shaded
warning area, the vehicle could
be damaged, and ...