2008 Pontiac Grand Prix Owner's Manual - Page 177

Fuel . (Fuel): Press this button to access the Average Fuel Economy, Instantaneous Fuel Economy, and Fuel Range modes. AVG ECONOMY (Average Fuel Economy): This screen will display the approximate average miles per gallon (mpg) or liters per 100 kilometers (L/100 km). This number is calculated based on the number of mpg (L/100 km) recorded since the last time this menu item was reset. To reset the average fuel economy for the vehicle, follow this procedure: 1. Press the set/reset button to reset to zero. 2. Press the fuel button again to advance to the next screen. INST ECONOMY (Instantaneous Fuel Economy): This screen displays the current fuel economy at a particular moment and will change frequently as driving conditions change. Unlike average fuel economy, this screen cannot be reset. Press the fuel button again to advance to the next screen. RANGE: This screen displays the approximate number of remaining miles or kilometers the vehicle can be driven without refueling. This estimate is based on the average fuel economy for the amount of fuel remaining in the fuel tank and the current driving conditions. This estimate will change if driving conditions change. For example, if driving in traffic and making frequent stops, the display may read one number, but if the vehicle is driven on a freeway the number may change even though the same amount of fuel is in the fuel tank. This is because different driving conditions produce different fuel economies. Generally, freeway driving produces better fuel economy than city driving. If the fuel tank contains less than 2 gallons (7.6 L), the LOW FUEL message will appear on the DIC screen. Fill the fuel tank as soon as possible to avoid running out of fuel. See "Low Fuel" under DIC Warnings and Messages on page 3-67. Press the fuel button again to advance to the next screen. 3-61