GM Service Manual Online
For 1990-2009 cars only

The speedometer shows the vehicle's speed in both miles per hour (mph) and kilometers per hour (km/h).

The vehicle's odometer works together with the Driver Information Center (DIC). The Trip odometer can be set. See "Trip Odometer" under DIC Operation and Displays for more information.

The odometer mileage can be checked while the vehicle is not running. Simply press the trip stem on the instrument panel cluster.

If the vehicle ever needs a new odometer installed, the new one will be set to the correct mileage total of the old odometer.