1997 Chevrolet Corvette Owner's Manual - Page 208

I Snow can trap exhaust gasesunder your vehicle. CO This can cause deadly (carbon monoxide) gas to get inside.CO could overcome you and kill you. You can't seeit or smell it, so you might not know it is in your vehicle.Clear away snowfrom around the base of your vehicle, especiallyany that is blocking your exhaust pipe. And check around again fromtime to time to be sure snow doesn't collect there. Open awindow just a little on the side of the vehicle that's away from the wind. This will help keep CO out. Run your engine only as long as must. This saves you fuel. Whenyou run the engine, make it go a little faster than just idle. That is, push the accelerator slightly. This uses less fuel for heat that you get and it keeps the the battery charged. You will need a well-charged battery to restart the vehicle, and possibly for signaling later on with your headlamps. Let theheater run for a while. Then, shutthe engine off and close thewindow almost all the way to preserve the heat. Start the engine again and repeat this only when you feel really uncomfortable from thecold. But do it as littleas possible. Preserve the fuel as longas 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. 4-29