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:
Running the Vehicle
While Parked
It is better not to park with the
engine running. But if you ever have
to, here are some things to know.
WARNING!
Idling a vehicle in an enclosed
area with poor ventilation is
dangerous. Eng ...
Tire Sealant
Read and follow the safe handling
instructions on the label adhered to
the sealant canister.
Check the tire sealant expiration
date on the sealant canister.
The sealant canister should be
re ...
Radio Frequency Identification (RFID)
RFID technology is used in some vehicles for functions such as tire pressure
monitoring and ignition system security, as well as in connection with
conveniences such as key fobs for remote door lock ...