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:
Rear Compartment Fuse
Block (CTS-V Wagon)
The rear compartment fuse block is
located on the passenger side of the
vehicle, behind the trim panel in the
rear compartment.
The vehicle may not be equipped
with all of the fuses and relay ...
Washer Fluid
Washer Fluid
When windshield washer fluid is needed, be sure to read the manufacturer's
instructions before use. If operating the vehicle in an area where the
temperature may fall below freezing, ...
Oil Pressure (CTS-V Only)
This display shows the oil pressure
in either kilopascals (kPa) or pounds
per square inch (psi). ...