2003 Chevrolet Impala Owner's Manual - Page 172

MODE: Press this button to cycle through three modes of operation - Off, Compassfiemperature and Trip Computer mode. Off: No driver information is displayed in this mode of operation. Compassll'emperature Mode: One of eight compass readings and the outside temperature are displayed. If the temperature is below 38°F (3"C), the word ICE is displayed for two minutes. Trip Computer: 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. Setting the Variance 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. Turn the iunition on and cycle the DIC to the Compassfiemperature mode. Press the RESET button for approximately five seconds. The last entered variance zone number and VAR will be displayed. Press the MODE button until the proper variance number on s -the map i shown. Press the RESET button to set the new variance zone and resume normai operation. ~ 3-49