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 
, and
an Advisor can run a check.
See also:
Vehicle Identification Number (VIN)
This legal identifier is in the front corner of the instrument panel, on the
left side of the vehicle. It can be seen through the windshield from outside.
The VIN also appears on the Vehicle Cer ...
Instrument Panel
CTS Shown, CTS–V Similar
A. Air Vents.
B. Driver Information Center (DIC).
C. Instrument Panel Illumination
Control.
D. Turn and Lane-Change Signals.
E. Instrument Cluster.
F. Windshield Wip ...
Fuel
Use of the recommended fuel is
an important part of the proper
maintenance of this vehicle. To help
keep the engine clean and maintain
optimum vehicle performance, we
recommend the use of ga ...