Chevrolet 1997 Monte Carlo Owner's Manual page 74

Engine Coolant Heater (Option)
3. Plug it into a normal, grounded 1 10-volt AC outlet.
I
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.
In very cold weather, 0 O F
(- 1 8
O
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 in a minimum of
four hours prior to starting your vehicle.
To Use the Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord, located
behind the vehicle's passenger side headlamp fixture.
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 Chevrolet dealer in the area where you'll be
parking your vehicle. The dealer can give you the best
advice for that particular area.