1998 Pontiac Firebird Owner's Manual - Page 198

I A CAUTION: I 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 can't seeit or smell it, you might not so know it is in your vehicle. Clear away snow from around the base your vehicle, especially any of that is blocking your exhaust pipe. And check around again from time time to be to sure snow doesn't collect there. Open a window just a littleon the side the of f'rom the wind. This will help vehicle that's away keep CO out. Run yourengine only as long as you must. This saves fuel. When you run the engine, make a little faster it go than just idle. That is, push the accelerator slightly. This uses less fuel the heat that you get it keeps the for and battery charged.You will need a well-charged battery to restart the vehicle, and possibly signaling lateron for with your headlamps. Let heater run for a while. the Then, shut the engine off and close the window almost the all the way to preserve the heat. Start engine again and repeat thisonly when youfeel really uncomfortable from the cold.But do it as little as possible. Preserve the fuel as long as you can. help keep warm, youcan get To out of the vehicle and some fairly vigorous exercises do every halfhour or so until help comes. 4-29