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Automatic Dimming Rearview Mirror
with OnStar
®
and Compass
Your vehicle may have an automatic dimming
rearview mirror with a compass and OnStar
®
.
The automatic dimming feature enables the mirror
to sense nighttime glare from vehicle headlamps
from behind and automatically dim to reduce
the glare to a safe level. The automatic dimming
feature turns on each time the vehicle is started.
O: This is the on/off button.
Press and hold the on/off button until the indicator
light located to the left of the button goes out
indicating the feature is off. To turn the feature
back on, press and hold the on/off button until the
indicator light comes on.
There are also OnStar
®
buttons located at the
bottom of the mirror face. See your retailer
for more information on the system and how to
subscribe to OnStar
®
. See OnStar
®
System
on page 135 for more information about the
services OnStar
®
provides.
Compass Operation
Press the on/off button once to turn the compass
on or off.
When the ignition and the compass feature are
on, the compass will show two character boxes for
a few seconds. After a few seconds, the mirror
will display the current compass direction.
Compass Calibration
If after a few seconds the display does not show a
compass direction, (N for North for example),
there may be a strong magnetic field interfering
with the compass. Such interference may be
caused by a magnetic antenna mount, note pad
holder, or similar object. If the letter C appears
in the compass window, the compass may need to
be reset or calibrated.
The mirror can be calibrated by driving the vehicle
in circles at 5 mph (8 km/h) or less until the
display reads a direction.
133