1998 Oldsmobile Bravada Owner's Manual - Page 79

Engine Coolant Heater(If Equipped) 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 be plugged i n a minimum of four hours prior to starting your vehicle. 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 won't reach, use a heavy-duty three-prong extension cord rated for at least 15 amps. 4. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts. If you don't, it could be damaged. How long should you keep the coolant heater plugged in? The answer depends on the outside temperature, the kind of oil you have, and some other things. Instead of trying to list everything here. we ask that you contact your retailer in the area where you'll be parking your vehicle. The retailer can give yo11the best advice for that particular area. To Use the Engine Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. The cord is located on the driver's side of the engine compartment, behind the underhood fuse block. 3. Plug it into a normal, grounded 1 10-volt AC outlet.