2013 Chevrolet Volt Owner Manual - Page 209

Driving and Operating If in Sport, Mountain, or Hold Mode, the mode 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 5‑49. 9-23 Press the DRIVE MODE button again to return to Normal Mode and it becomes active after three seconds. The Sport light comes on when Sport Mode is selected. See Sport Mode Light on page 5‑22. Each time the vehicle is started, it will return to Normal Mode. Sport Mode Highlight either the Mountain, Sport, or Hold 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. At next start, the vehicle will default to 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. Sport Mode provides more responsive acceleration than Normal Mode, but can reduce efficiency. Use Normal Mode whenever possible. Press the DRIVE MODE button to select Sport Mode. Mountain Mode Mountain Mode should be selected at the beginning of a trip before climbing steep, uphill grades and when expecting to drive in very hilly or mountainous terrain. This mode maintains a reserve electrical charge of the high voltage battery to