2011 Chevrolet Volt Owner's Manual - Page 333

Driving and Operating WARNING (Continued) . 9-31 Running the Vehicle While Parked It is better not to park with the propulsion system on. But if you ever have to, here are some things to know. { WARNING It can be dangerous to get out of the vehicle if the electric drive unit shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. Do not leave the vehicle with the propulsion system on unless you have to. If you have left the propulsion system on, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on level ground, always set the parking brake and move the shift lever to P (Park). Follow the proper steps to be sure the vehicle will not move. See Shifting Into Park on page 9‑22. There are holes or openings in the vehicle body from damage or aftermarket modifications that are not completely sealed. If unusual fumes are detected or if it is suspected that exhaust is coming into the vehicle: . { WARNING Leaving the engine running in Extended Range Mode in an enclosed area with poor ventilation is dangerous. Engine exhaust may enter the vehicle. Engine exhaust contains Carbon Monoxide (CO) which cannot be seen or smelled. It can cause unconsciousness and even death. Never run the engine in an enclosed area that has no fresh air ventilation. For more information, see Engine Exhaust on page 9‑30. Drive it only with the windows completely down. Have the vehicle repaired immediately. . Never park with the engine running in Extended Range Mode in an enclosed area such as a garage or a building that has no fresh air ventilation.