1997 Cadillac Catera Owner's Manual - Page 79

To Use the Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. 3. Plug it into a normal, grounded 110-volt AC outlet. /\ CA-'TIC'J: 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 seriously injured. Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord won't reach, usea 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 keep it away to from moving engine parts. If you don't, it could be damaged. How long should you keep coolant heater plugged the in? Theanswer 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 Catera dealer in the area where you'll be parking your vehicle. The dealer can give you the bestadvice for that particular area. 2-18