Oldsmobile 1999 Silhouette - Manual (Page 183)

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Speedometer and Tamper
Resistant Odometer
Your speedometer lets you see your speed in both miles
per hour (mph) and kilometers per hour (km/h). Your
odometer shows how far your vehicle has been driven,
in either miles (used in the United States) or kilometers
(used in Canada).
Your vehicle has a tamper - resistant odometer. If you see
silver lines between the numbers, you’ll know that
someone has probably tried to turn it back, so the
numbers may not be true.
You may wonder what happens if your vehicle needs a
new odometer installed. If the new one can be set to the
mileage total of the old odometer, then that will be done.
If it can’t, then it’s set at zero and a label must be put on
the driver’s door to show the old mileage reading when
the new odometer was installed.
Trip Odometer
The trip odometer can tell you how far your vehicle has
been driven since you last set it to zero. To set it to zero,
push the reset button which is located above and to the
right of the temperature gage.