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). Trip A and Trip B can be set on the odometer. See "Trip Information" under DIC Operation and Displays.

The odometer mileage can be checked without the vehicle running. Open the driver's door and the mileage is briefly displayed.

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