1993 Buick Roadmaster Owner's Manual - Page 197

Run your engine only as long as you must. This saves Towing,a Trailer fuel. When yourun 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 keeps the the it /!\ CAUTIONbattery charged. You will need a well-charged battery to on restart the vehicle, and possibly for signaling later If you don't use the correctequipment and drive with your headlights. Let the heater for awhile. run properly, you can lose control when you pull a off Then, shut the engine and close the window almost all the way to preserve the heat. Start the engine again and repeat this only when you really uncomfortable feel from the cold. But do as 'little as possible. Preserve the it fuel as long as you can. help keep warm,you can get To out of the vehicle anddo some fairly vigorous exercises so every half hour or until help comes. I trailer. For example, if the trailer is tooheavy, the brakes may not work well- or even at all, You and your passengers could be seriously' injured. Pull a trailer only if youhave followed I the stepsin this section.