Owner's Manual
Page 152
Analog Control Buttons (DeVille Concours Only) GAL FUEL USED (Reset): Press the INFORMATION button to display the GAL FUEL USED on the DIC, then press and hold the RESET button ... MPG AVG (Average Fuel Economy), then press and holdthe RESET button until 0.0 MPG AVG is displayed. Pressing INFO RESET when non-resettable a display appears willcause a "recall" mode to display the AVG MPH (Average Speed), then press and holdthe RESET button until AVG MPH 0.0 is displayed. When this button will appear. MPG...
Analog Control Buttons (DeVille Concours Only) GAL FUEL USED (Reset): Press the INFORMATION button to display the GAL FUEL USED on the DIC, then press and hold the RESET button ... MPG AVG (Average Fuel Economy), then press and holdthe RESET button until 0.0 MPG AVG is displayed. Pressing INFO RESET when non-resettable a display appears willcause a "recall" mode to display the AVG MPH (Average Speed), then press and holdthe RESET button until AVG MPH 0.0 is displayed. When this button will appear. MPG...