GMC 1995 Suburban Owner's Manual page 91

I
1 A
CAUTION:
Do not use gasoline or starting "aids," such as ether, in the air
intake. They could damage your engine. There could also be a
fire, which could cause serious personal injury.
Engine Coolant Heater
7
(Option)
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 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.
3. Plug
it into a normal, grounded 1 l0-volt outlet.
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
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