Oldsmobile 1999 Silhouette - Manual (Page 198)

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D MODE (Mode Button): Press this button to cycle
through three modes of operation -- Off,
Compass/Temperature and Trip Computer mode.
In the Trip Computer mode, pressing the MODE
button cycles through the five displays. Press the
MODE button after the last Trip Computer display to
return the DIC to the OFF mode.
Off: No driver information is displayed in this mode
of operation.
Compass/Temperature Mode: One of eight compass
readings and the outside temperature are displayed. If
the temperature is below 38
_F (3_C), the temperature
reading will toggle between displaying the outside
temperature and the word “ICE” for two minutes.
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 variance must be set.
Setting the Variance