2003 Chevrolet Impala Owner's Manual - Page 174

Trip Computer There are five trip computer displays which may be stepped through by pushing the MODE button. The information will appear in the following order: AVG ECON (Average Fuel Economy): This shows the average fuel economy since the last reset. INST ECON (Instantaneous Fuel Economy): This shows fuel economy for the most recent second of driving. RANGE (Trip Range): This shows the estimated distance that can be traveled with the remaining fuel. The fuel economy used tocalculate range is based on the last few hours of driving. When in a low fuel condition, LO is displayed. FUEL USED (Trip Fuel Used): This shows the accumulated fuel used since the last reset. AVG SPEED (Average Speed): This shows the average speed since the last reset. Resetting the Trip Computer Press and hold the RESET button for at least three seconds. The reset is acknowledged with all segments of the display lit briefly and a chime. A reset can only be done in AVG ECON, FUEL USED and AVG SPEED displays. Each setting must be reset individually. 3-51