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:
Instrument Panel Illumination Control
The instrument panel brightness
knob is located on the instrument
panel next to the steering column.
(Instrument Panel
Brightness): Turn the knob
clockwise or counterclockwise to
brighten ...
SERVICE TRACTION
CONTROL
This message displays when
there is a problem with the
Traction Control System (TCS).
The TCS/StabiliTrak warning light
on the instrument panel cluster also
comes on. When this message
disp ...
Keyless Unlocking
With the transmitter within 1m (3 ft), approach the front door and pull the
handle. If the transmitter is recognized, the door will unlock and open.
Entering any door other than the driver door wi ...