Oldsmobile 1999 Silhouette - Manual (Page 200)

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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:
D AVG ECON (Average Fuel Economy): This shows
the average fuel economy since the last reset.
D INST ECON (Instantaneous Fuel Economy): This
shows fuel economy for the most recent second
of driving.
D RANGE (Trip Range): This shows the estimated
distance that can be traveled with the remaining fuel.
The fuel economy used to calculate range is based on
the last few hours of driving.
D FUEL USED (Trip Fuel Used): This shows the
accumulated fuel used since the last reset.
D AVG SPEED (Average Speed): This shows the
average speed since the last reset.
Resetting the Trip Computer
Press and hold the MODE and E/M buttons for at least
two seconds. The reset is acknowledged with the display
showing all segments on for a period of half a second. A
reset can only be done in AVG ECON, FUEL USED
and AVG SPEED displays. Resetting affects all three
displays regardless of which display you are in. RANGE
will not be affected.