Mirrors
Manual Rearview Mirror
To reduce glare from lamps behind you, move the lever
toward you to the night position. Your vehicle may
also have reading lamps. Press the buttons, located
under the mirror, up to turn the lamps on or off.
Automatic Dimming Rearview Mirror
with OnStar
®and Compass
Your vehicle may have an automatic dimming rearview
mirror with OnStar®, compass and reading lamps.
This 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. Press the MIRROR button once
and the green indicator light located to the left of the
button will go out indicating the feature is off. To turn
the feature back on, press and release the MIRROR
button and the green indicator light will come on.
The reading lamps, located under the mirror, can be
turned on or off by pushing the buttons up.There are three additional buttons for the OnStar
®
system. See your dealer for more information on the
system and how to subscribe to OnStar®. See OnStar®
in the Index for more information.
Compass Operation
Press the compass 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 eld 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.
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Automatic Dimming Rearview
Mirror with OnStar
®, Compass
and Temperature Display
Your vehicle may have an automatic dimming rearview
mirror with OnStar®, compass and temperature
display. If the vehicle has this feature, the automatic
dimming mirror automatically dims to the proper level to
minimize glare at night from lights behind your vehicle.
The mirror also has a dual display in the upper right
corner of the mirror that shows the compass reading and
the outside temperature.
There are three additional buttons for the OnStar
®
system. See your dealer for more information on the
system and how to subscribe to OnStar®. See OnStar®
in the Index for more information.
YOn/Off:Press this button to operate the automatic
dimming, compass and temperature features.
Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on each
time the ignition is started. A light near the on/off button
will come on to indicate the automatic dimming is on.
If the automatic dimming function is off, press and hold
the on/off button for four seconds to manually turn
the system back on.
Temperature and Compass Display
Press the on/off button, located in the center, to cycle
between °F, °C and off. If the display reads CAL,
the compass needs to be calibrated. For more
information, see “Compass Calibration” later in this
section.
If an abnormal temperature reading is displayed for an
extended period of time, please consult your dealer.
Under certain circumstances, a delay in updating
the temperature is normal.
Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. If not
adjusted to account for compass variance, the mirror’s
compass could give false readings. The mirror is
set in zone eight upon leaving the factory. It will be
necessary to adjust the compass to compensate
for compass variance if you live outside zone eight.
Under certain circumstances, as during a long distance
cross-country trip, it will be necessary to adjust for
compass variance.
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