2013 Chevrolet Volt Owner Manual - Page 214

9-28 Driving and Operating Running the Vehicle While Parked It is better not to park with the propulsion system running. If the vehicle is left with the propulsion system running, follow the proper steps to be sure the vehicle will not move. See Shifting Into Park on page 9‑19 and Engine Exhaust on page 9‑27. Electric Drive Unit The vehicle uses an electric drive unit. { WARNING It is dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. Do not leave the vehicle when the propulsion system is running. If you have left the propulsion system running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to P (Park). See Shifting Into Park on page 9‑19. Make sure the shift lever is fully in P (Park) before starting the propulsion system. The vehicle has an electric drive unit shift lock control system. The regular brake must be fully applied first and then the shift lever button pressed before P (Park): This position locks the front wheels. It is the best position to use when starting the propulsion system because the vehicle cannot move easily.