Oldsmobile 2001 Alero - Manual (Page 94)

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Engine Coolant Heater (Option)
2.4L L4 Engine
3400 V6 Engine
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.