1997 Buick Century Owner's Manual - Page 97

To Use the Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. The near the cord is attached to the diagonal brace coolant recoverytank. 3. Plug it into a normal, grounded 110-volt AC outlet. I 4. Before starting the engine, be sure to unplug and store the cord as itwas before to keep it away from moving engine parts. If you don't, it could be damaged. How long shouldyou keep the coolant heaterplugged in? Theanswer depends on the outside temperature, the of kind of oil you have, and some other things. Instead trying to list everything here,we ask that you contact your Buick dealerin the areawhere you'll be parking your vehicle. The dealercan give you the best advice for that particular area. I Plugging the cord into an ungrounded outlet could causean electrical shock. Also, the wrong kind of extension cord could overheat and cause a fire. You could be seriouslyinjured. Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord won't reach, use a heavy-duty three-prong extension cord rated for at least 15 amps. 2-21