Speedometer And Odometer; Trip Odometer; Tachometer - Buick 2009 Lucerne Owner's Manual

Speedometer and Odometer

The speedometer shows the vehicle speed in both
miles per hour (mph) and kilometers per hour (km/h).
The odometer shows how far the vehicle has been
driven, in either miles or kilometers.
This vehicle has a tamper resistant odometer.
If the vehicle needs a new odometer installed, the new
one can be set to the mileage total of the old odometer.
If this is not possible, it is set to zero and a label must be
put on the driver's door to show the old mileage reading
when the new odometer was installed.
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Trip Odometer

A trip odometer show how far the vehicle has been
driven since the odometer was last set to zero.
See Driver Information Center (DIC) on page 3-51 for
information on resetting the trip odometer.

Tachometer

The tachometer displays the engine speed in revolutions
per minute (rpm).