1998 Cadillac DeVille Owner's Manual - Page 239

Tie a red cloth to your vehicle alert police that to you've been stopped by the snow. Put on extra clothing wrap a blanket around you. or If you have no blankets or extra clothing, make body insulators from newspapers, burlap bags, rags, floor mats -- anything you can wrap around yourself or to tuck under your clothing keep warm. Snow can trap exhaust gases under yourvehicle. This can cause deadly CO (carbon monoxide) gas to get inside. CO could overcomeyou and kill you. You can't see it or smell it, so you might not know it is in yourvehicle. Clear awaysnow from around thebase of your vehicle, especiallyany that is blocking your exhaustpipe. And check around again from time to time be sure to 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. 4-28