Buick 1993 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 engine warm-up.
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 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 outlet. If the cord won't reach, use a
heavy-duty three-prong extension cord rated for
at least 15 amps.
After you've used the block heater, be sure 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
~
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.