2011 Chevrolet Impala Owner's Manual - Page 218

9-10 Driving and Operating WARNING (Continued) If the vehicle is stuck in the snow: . Blizzard Conditions Being stuck in snow can be a serious situation. Stay with the vehicle unless there is help nearby. If possible, use the Roadside Assistance Program on page 13‑6. To get help and keep everyone in the vehicle safe: . WARNING (Continued) For more information about carbon monoxide, see Engine Exhaust on page 9‑24. Snow can trap exhaust gases under your vehicle. This can cause deadly CO (Carbon Monoxide) gas to get inside. CO could overcome you and kill you. You cannot see it or smell it, so you might not know it is in your vehicle. Clear away snow from around the base of your vehicle, especially any that is blocking the exhaust. Run the engine for short periods only as needed to keep warm, but be careful. Clear away snow from around the base of your vehicle, especially any that is blocking the exhaust pipe. Check again from time to time to be sure snow does not collect there. Open a window about 5 cm (2 in) on the side of the vehicle that is away from the wind to bring in fresh air. Fully open the air outlets on or under the instrument panel. Adjust the climate control system to a setting that circulates the air inside the vehicle and set the fan speed to the highest setting. See Climate Control System in the Index. (Continued) Turn on the hazard warning flashers. Tie a red cloth to an outside mirror. . . . { WARNING Snow can trap engine exhaust under the vehicle. This may cause exhaust gases to get inside. Engine exhaust contains Carbon Monoxide (CO) which cannot be seen or smelled. It can cause unconsciousness and even death. (Continued) . .