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:
How OnStar Service Works
: This blue button connects you
to a specially
trained OnStar advisor to verify your account information
and to answer questions.
: Push this red emergency button to
get priority help
fro ...
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL® engine
coolant mixture. See Recommended
Fluids and Lubricants
and Maintenance Schedule for more information.
The following explains ...
Recommended Fluids andLubricants
Fluids and lubricants identified below by name,
part number, or specification may be obtained from
your dealer.
...