Pontiac 2002 Sunfire - Manual (Page 85)

2-24
Engine Coolant Heater (If Equipped)
2.2L L4 (LN2) Engine
2.4L L4 (LD9) and 2.2L L4 ECOTEC (L61) 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. At temperatures above 32
_F (0_C),
use of the coolant heater is not required.