Buick 1993 Skylark Owner's Manual page 109

Speedometer and Odometer Trip Odometer
Your speedometer lets you see your speed in both miles A trip odometer can tell you how many miles you have
per hour (mph) and kilometers per hour (km/h). Your
driven since
you
last set it
to
zero.
To
reset it, push the
odometer shows how far your vehicle has been driven,
button.
in either miles (used in the
U.S.)
or kilometers (used in
Canada).
Your Buick has a "tamper-resistant odometer." If you
can see silver lines between the numbers, probably
someone has tried to turn it back. The numbers may not
be true.
I
You may wonder what happens if a car has to have a
new odometer installed. If possible, the new one has to
be set to the same reading the old one had. If it can't be,
then it's set at zero, but a label on the driver's door must
show the old reading and when the new. one was
installed.