1994 Pontiac Bonneville Owner's Manual - Page 158

Put on extra clothing or wrap a blanket around you. 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 tuck under your clothing to keep warm. You can run the engine to keep warm, but be careful. 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 for the heat that you get and it keeps the battery charged. You will need a well-charged battery io restart the vehicle, and possibly for signaling later on with your headlights. 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 it as 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. 157...