1997 Buick Regal Owner's Manual - Page 97

NOTICE: Your engine is designed to work with the electronics in yourvehicle. If you add electrical parts oraccessories, youcould change the way the engine operates. Before adding electrical equipment, check with your dealer. If you don't, your engine might not perform properly. If you ever have to have your vehicle towed, see the partof this manualthat tells how to doit without damaging yourvehicle. See "Towing Your Vehicle" in the Index. Engine Coolant Heater (Option) In very cold weather, 0°F (- 1 SOC) or colder, the engine coolant heater can help. You'll get easier starting and better fuel economy during engine warm-up. Usually, the coolant heater should be plugged in a minimum of four hours prior to starting your vehicle. 2-21