GM None Pontiac Aztek - Manual (Page 179)

Driver Information Center (DIC)
If your vehicle is equipped with the Driver Information
Center (DIC), the display is located on the instrument
panel cluster directly above the steering column.
The DIC will show information about the vehicle and the
surroundings.
The DIC has a compass display to show you which
direction the vehicle is driving.
Compass Variance
Compass variance is the difference between magnetic
north and geographic north. In some areas of the
country, the difference is great enough to cause the
compass to give false readings. If this occurs, the
compass must be set.
Automatic Compass Calibration
The compass is self-calibrating, which eliminates the
need to manually set the compass. When the vehicle is
new, the calibration process may not be complete. In
these cases, the calibration symbol C will be displayed
where the compass reading is normally displayed.
To calibrate the compass, in an area free from large
metal objects, make three 360 degree turns. The
calibration symbol will turn off and the compass reading
will be displayed.
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