2011 Chevrolet Volt Owner's Manual - Page 328

9-26 Driving and Operating At next start, the vehicle will default to the Normal Mode. Drive modes can then be selected again as desired. During some conditions, certain drive modes may be unavailable. The unavailable mode is grayed out in the DIC menu and cannot be selected. If in Sport or Mountain Mode, either may become unavailable and the vehicle will return to Normal Mode. The indicator light goes off and a DIC message displays. See Propulsion Power Messages on page 5‑50. Driver Selected Operating Modes While driving in Electric or Extended Range Mode, additional operating modes can be selected. Highlight either the Mountain or Sport Mode, then release the DRIVE MODE button. After three seconds, the new drive mode will become active. Pressing the DRIVE MODE button again will return to Normal Mode, and become active after three seconds. Press the DRIVE MODE button to display selectable drive modes in the Driver Information Center (DIC). Continue pressing to scroll through the modes.