Driver Information Center (DIC) Description and Operation: English/Metric
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The HUD indicates the speedometer in either english (mph) or metric (km/h) units. When the DIC ENG/MET button is pressed the HUD units change in accordance with the DIC units.