1998 Cadillac Seville Owner's Manual - Page 226

Run your engine only long as you must.This saves as fuel. When you run the engine, make go a little faster it than just idle. That is, 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 battery to restart the vehicle, and possibly signaling later on for with your headlamps.Let the heater run for a while. Loading Your Vehicle FRT. TIRE-LOADING INFORMATION VEHICLE CAP. WT. CTR. RR. TOTAL LBS. MAX. LOADING & GVWR SAME AS VEHICLE COLD TIRE CAPACITY WEIGHT XXX Then, shut the engine off and close the window almost PRESSURE TIRE SPEED SIZE all the way to preserve the heat. Start engine again the PSI/KPa RTG and repeat this only when you really uncomfortable feel FRT. RR. from the cold. But do it as little as possible. Preserve the SPA. fuel as long as you can. To help keep warm, you can get IF TIRES ARE HOT, ADD out of the vehicle and do some fairly vigorous exercises SEE OWNER'S MANUAL 4PS1/28KPa FOR ADDITIONAL every half hour or so until help comes.