Oldsmobile 2003 Silhouette Owner's Manual page 199

The trip odometers will continue to keep track of
miles (kilometers) driven even if they are not currently
displayed. To reset the odometer to zero (0), press
and hold the tripheset button for at least 1.5 seconds,
but less than three seconds. Only the trip odometer that
is showing in the display will be reset.
Retro-Active Reset
Each of the two trip odometers has a feature callea
retro-active reset. This feature can be used to set
either (or both) trip odometer(s) to the number of miles
(kilometers) driven since the ignition was last turned
on. This can be used if you forget to reset your
trip odometer at the beginning of a trip. To use the
retro-active reset feature, press and hold the tripheset
button for at least three seconds. The trip odometer
will then display the number of miles (kilometers) driven
since the ignition was last turned on and you began
driving. (If you use the retro-active reset feature
after you have started the vehicle, but before you begin
moving, the display will show the number of miles
(kilometers) you drove during the last ignition cycle.)
Once you begin driving, the trip odometer will
accumulate mileage. For example, if you have driven
5.0 miles (8.0 km) since you started your vehicle,
and then activate the retro-active reset feature, the
display will show 5.0 miles (8.0 km). As you drive,
the display will then increase to 5.1 miles (8.2 km),
5.2 miles (8.4 km), etc. Only the trip odometer that is
displayed will be affected by the retro-active reset
so that both trip odometers can be used separately.
Safety Belt Reminder Light
When the key is turned to RUN or START, a chime will
come on for several seconds to remind people to
fasten their safety belts.
The safety belt light will
also come on and stay
on for several seconds.
If the driver's belt is
already buckled, neither
the chime nor the light
will come on.
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