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:
Safety
Standard safety items include four-wheel-disc antilock brakes and an
electronic stability system. The system has rollover mitigation technology that
senses imminent rollovers and applies individua ...
Competitive Driving Mode
To select this optional handling
mode, press the TCS/StabiliTrak
button quickly two times and
STABILITRAK COMPETITIVE
MODE displays in the Driver
Information Center (DIC). While in
the Sta ...
Vehicle Messages
Messages displayed on the DIC indicate the status of the vehicle or some action
may be needed to correct a condition. Multiple messages may appear one after another.
The messages that do not requir ...