1996 Cadillac DeVille Owner's Manual - Page 80

NOTICE: Your engine is designed to work with the electronics in your vehicle. If you add electrical parts oraccessories, you could change theway 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 do it without damaging your vehicle. See "Towing Your Vehicle"in the Index. Engine Coolant Heater (Option) (Canada Only) In very cold weather, 0°F (- 18 C) 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 pluggedin a minimum of be four hours prior to starting your vehicle. O 2-17