2003 Cadillac DeVille Owner's Manual - Page 181

Here are a few concerns some owners have had about the fuel gage. All of these situations are normal and do not indicate that anything is wrong with the fuel gage: At the gas station the gas pump shuts off before the gage reads full. GAL FUEL USED on the DIC does not correspond exactly to the amount of fuel remaining as shown on the fuel gage. The gage may change when you turn, stop or accelerate quickly. quickly The average fuel economy (AVG) display shows the average miles per U.S. gallon. To reset the average fuel economy, press the INFO button until the MPG AVG is displayed on the DIC. Press and hold the INFO RESET button until both the fuel data display and DIC display reads 0.0. The RANGE display shows how far the computer thinks you can travel with the fuel that is in the tank. The computer does not know what driving conditions will be like for the rest of your trip, so the range is estimated based on the recent fuel economy. Therefore, the range reading may change as your driving habits change. Going from city to highway driving may increase the range reading. The FUEL LEVEL LOW message will be displayed in the Driver lnformation Center (DIC) and a chime will sound when there is approximately 3 gallons (11.4 L) of fuel remaining. Fuel Data Display (Digital Cluster Only) The fuel data display tells you all you about the fuel economy and how far you can travel with the fuel remaining. If the range display in the DIC shows LO, you should stop for fuel as soon as possible. This means that you have less than approximately 1.2 gallons (4.7 L) of fuel remaining. On the analog cluster, fuel data can be obtained by pressing the INFO button. See Driver lnformation Center (DIC) on page 3-57. E 3-56