Buick 2009 Enclave Owner's Manual page 165

Each trip odometer can be reset to
zero separately by pressing the
set/reset button while the desired
trip odometer is displayed.
The trip odometer has a feature
called the retro-active reset. This can
be used to set the trip odometer to
the number of miles (kilometers)
driven since the ignition was last
turned on. This can be used if the
trip odometer is not reset at the
beginning of the trip.
To use the retro-active reset feature,
press and hold the set/reset button
for at least four seconds. The trip
odometer will display the number of
miles (mi) or kilometers (km) driven
since the ignition was last turned
on and the vehicle was moving.
Once the vehicle begins moving,
the trip odometer will accumulate
mileage. For example, if the vehicle
was driven 5 miles (8 km) before
it is started again, and then the
retro-active reset feature is activated,
the display will show 5 miles (8 km).
As the vehicle begins moving, the
display will then increase to 5.1 miles
(8.2 km), 5.2 miles (8.4 km), etc.
If the retro-active reset feature is
activated after the vehicle is started,
but before it begins moving, the
display will show the number of
miles (mi) or kilometers (km) that
were driven during the last ignition
cycle.
RANGE
Press the trip/fuel button until
RANGE displays. This display
shows the approximate number
of remaining miles (mi) or
kilometers (km) the vehicle
can be driven without refueling.
The display will show LOW if
the fuel level is low.
The fuel range estimate is based
on an average of the vehicle's fuel
economy over recent driving history
and the amount of fuel remaining in
the fuel tank. This estimate will
change if driving conditions change.
Instrument Panel
For example, if driving in traffic and
making frequent stops, this 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. Fuel range cannot
be reset.
AVG (Average) ECONOMY
Press the trip/fuel button until
AVG ECONOMY displays. This
display shows 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 AVG ECONOMY, press
and hold the set/reset button.
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