GM Service Manual Online
For 1990-2009 cars only

The speedometer shows the speed in both miles per hour (mph) and kilometers per hour (km/h). See "MPH (km)" under DIC Operation and Displays for more information.

The odometer mileage can be checked without the vehicle running. The vehicle's odometer works together with the driver information center. Trip A and Trip B can be set on the odometer. See "Trip Fuel" under DIC Operation and Displays for more information.

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