1993 Buick LeSabre Owner's Manual - Page 74

Engine Block Heater (Canada Only) In very cold weather,0 O F (-18 C) or colder, the engine block heater can help. You'll get easier starting and better fuel economy during enginewarm-up. After you've used the block heater, besure to store the cord as it was before,to keep it away from moving engine parts. If you m't, it could be damaged w 1 ~ To use the block heater: 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. 3. Plug it into a normal, grounded 110-volt outlet. CAUTION: 0 Plugging the cord intoan 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 outlet.If the cord won't reach, use a heavy-duty three-prongextension cord rated for at least 15 amps. How long should you keep the block heater plugged in? The answer depends on the weather, the kind of oil you have, and some other things. Instead of trying to list everything here, we ask that you contact a Buick dealer in the area where you'll be parking your vehicle. The dealer can give you the best advice for that particular area.