2014 Chevrolet Silverado 3500 HD Crew Cab Owner Manual - Page 279

Driving and Operating . 9-13 Tie a red cloth to an outside mirror. Warning (Continued) . { 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. If the vehicle is stuck in the snow: . 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 Systems" in the Index. . If it takes some time for help to arrive, now and then when you run the engine, push the accelerator pedal slightly so the engine runs faster than the idle speed. This keeps the battery charged to restart the vehicle and to signal for help with the headlamps. Do this as little as possible to save fuel. If the Vehicle Is Stuck Slowly and cautiously spin the wheels to free the vehicle when stuck in sand, mud, ice, or snow. See "Rocking the Vehicle to Get It Out" later in this section. If the vehicle has a traction system, it can often help to free a stuck vehicle. Refer to the vehicle's traction system in the Index. If stuck too severely for the traction system to free the vehicle, turn the traction system off and use the rocking method. 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. (Continued) For more information about carbon monoxide, see Engine Exhaust on page 9-31. To save fuel, run the engine for only short periods as needed to warm the vehicle and then shut the engine off and close the window most of the way to save heat. Repeat this until help arrives but only when you feel really uncomfortable from the cold. Moving about to keep warm also helps. . .