2004 Buick Century Owner's Manual - Page 87

Engine Coolant Heater To Use the Engine Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. The cord is attached to the underside of the vehicle's diagonal brace, which is located above the engine air cleaner/filter assembly. 3. Plug it into a normal, grounded 110-volt AC outlet. {CAUTION: Plugging the cord into an ungrounded outlet could cause an electrical shock. Also, the wrong kind of extension cord could overheat and cause a fire. You could be seriously injured. Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord will not reach, use a heavy-duty three-prong extension cord rated for at least 15 amps. 4. Unplug and store the cord as it was before to keep it away from moving engine parts, before starting the engine. If this is not done, the cord could be damaged. The vehicle may have this feature. In very cold weather, 0°F (−18°C) or colder, the engine coolant heater can help. The vehicle will start easier and get 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. At temperatures above 32°F (0°C), use of the coolant heater is not required. 2-21