1996 Chevrolet Corvette Owner's Manual - Page 188

Snow can trap exhaust gasesunder yourvehicle. This can cause deadlyCO (carbon monoxide) gas to get inside.CO could overcome you and kill you. You can't seeit orsmell it, so you might not know it is in yourvehicle. Clear away snow from around thebase of your vehicle, especially any that is blocking your exhaust pipe. And check around again from timeto time to be sure snow doesn't collect there. Open a window just a little on the side of the vehicle that's away fromthe wind. This will help keep CO out. Run your engine only as long as you must. This saves fuel. When you run the engine, make it go a little faster than just idle. That is, push the accelerator slightly. This uses less fuel forthe heat that you get and it keeps the battery charged. You will need awell-charged battery to restart the vehicle, and possibly for signaling later on with your headlamps. Let the heater run for awhile. Then, shut the engine off and close the window almost all the way to preserve the heat. Start the engine again and repeat this only when you feel really uncomfortable from the cold. But do itas little as possible. Preserve the fuel as long as you can. To help keep warm, you can get out of the vehicle and do some fairly vigorous exercises every half hour or so until help comes. 4-27