1997 Chevrolet Cavalier Owner's Manual - Page 192

A CAUTIl- N: Snow can trap exhaust gases under yourvehicle. CO This can cause deadly (carbon monoxide) gas to get inside. CO could overcomeyou and kill you. You can't seeit orsmell it, so you might not know it is in your vehicle. Clear awaysnow from around thebase of your vehicle, especially any that is blocking your exhaust pipe. And check around again from time to timebe sure snow to doesn't collect there. Open a window just a little on the sideof the vehicle that's away from thewind. This will help keep CO out. Run your engine only as longas you must. This saves fuel. When you run the engine, make it go a little faster than just idle. Thatis, push the accelerator slightly. This uses less fuel for the heat that you get and keeps the it battery charged.You will need a well-charged batteryto restart the vehicle, and possibly signaling later on for with your headlamps. Letthe 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 repeatthis only when youfeel really uncomfortable from the cold. But it as little as possible. Preserve the do 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 houror so until help comes.