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:
When the Light Flashes First and Then Is On Steady
If the light flashes for about a minute and then stays on, there may be a problem
with the TPMS. If the problem is not corrected, the light will come on at every
ignition cycle. See Tire Pressure ...
Setting the Time and Date
(Radio with CD and
Touchscreen)
To set the time:
1. Press the CONFIG button to
enter the menu options. Turn the
Menuknob to scroll through the
available setup features. Press
the SELECT knob or press the
Time screen butto ...
Storing a Flat or Spare Tire andTools
CAUTION:
Storing a jack, a tire, or other equipment
in the passenger compartment of the
vehicle could cause injury. In a sudden
stop or collision, loose equipment could
strike someone. Store al ...