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Automatic Dimming Rearview Mirror
with OnStar
®
and Compass
Your vehicle may have an automatic dimming rearview
mirror with a compass display. The mirror also
contains OnStar
®
controls. For more information see
OnStar
®
System on page 2-48.
The mirror includes an eight-point compass display in
the upper right corner of the mirror face. When on,
the compass automatically calibrates as the vehicle
is driven.
Mirror Operation
O
(On/Off): Press and hold the button, located on
the lower left side of the mirror face, for about
three seconds to turn the automatic dimming feature on
or off. The indicator light will illuminate when this
feature is active. The automatic dimming feature is
active each time the vehicle is started.
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 about
two seconds. After two seconds, the mirror will display
the compass heading.
Compass Calibration
If after two seconds, the display does not show a
compass heading (for example, N for North), there may
be a strong magnetic field interfering with the compass.
Such interference may be caused by a magnetic
antenna mount, magnetic note pad holder or a similar
magnetic item. If the letter C should ever appear in the
compass window, the compass may need calibration.
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.
The compass can be placed in calibration mode
manually by pressing and holding the on/off button
untilaCisshown in the compass display.
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