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:
Languages
The vehicle can be programmed to
respond in French or Spanish. Push
and ask an Advisor. Advisors
can speak French or Spanish. ...
Languages
The vehicle supports English,
French (Canadian), and Spanish.
The default language is English.
To change the display language,
see Vehicle Personalization for more information. ...
Ignition Positions
The ignition switch has four different positions.
Notice: Using a tool to force the key to turn in the ignition could cause damage to the switch or break the key. Use the correct key, make sure it ...