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:
Traction Control System (TCS)
The traction control system limits
wheel spin. The system turns on
automatically every time the vehicle
is started.
- To turn off traction control, press
and release the TCS/StabiliTrak
but ...
Remote Vehicle Start
With this feature the engine can be started from outside of the vehicle. ...
TPMS Malfunction Light and
Message
The TPMS will not function
properly if one or more of the TPMS
sensors are missing or inoperable.
When the system detects a
malfunction, the low tire warning
light flashes for about one minut ...