2003 Chevrolet Impala Owner's Manual - Page 171
2003 Chevrolet Impala Manual
Page 171 highlights
Driver information Center (DIC) RESET: You can reset the AVG ECON, FUEL USED or AVG SPEED trip computer modes by pressing and holding this button for three seconds while you are in the mode you wish to reset. A chime will sound to confirm that your requested change has been made and all the segments of the display will briefly light up. To change the display to a metric or English reading, press the RESET and MODE buttons at the same time. Hold them down for three seconds, and the display will change. A chime will be heard to confirm the new selection. The reset button can also be used to manually calibrate the compass. See "Manual Compass Calibration" later in this section. The reset button can be used to set the compass zone variation. See "Compass Variance" later in this section. Optional Sunroof Version Shown If your vehicle is equipped with the DIC, it will show information about the vehicle and the surroundings. It is located in the headliner between the sun visors. 3-48