GMC 2003 Envoy - Manual (Page 91)

Engine Coolant Heater
Y&ur vehicle may havg this teaturSr In very ccrfdi
uvea [her, O^F t-ifî'^C) ûr cûlder the engine coolant
healer can h&lp. Vcni'K get easier starting and belter ftjel
□conomy during engine warm-up. Usually, the coolant
heater should bo piugg&d in a minimum üF tour
hours prior
(0 starting your vehicle. At températures
above usa ol the coolant heater is nol
required
To Use the Engine Coolant Heater
1. Turn Dtf the engine.
È. Open the hood and unwrap ihe eleclrical cord.
The cord is located on the dnver's sido oF the
engine comparlment, behind the battery.
3. Plug rt Into a nomal, grounded 110-VoH AC ouliet.
Д CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the
wrong kind of extension card could overheat
and cause a fire- You could he seriously
injured. Plug the cord Into a properiy grounded
ihree-prong 110-volt AC outlet. If the cord
won't reach, use a henvy-duty three-prong
extension cord rated for at least 15 amps.
4. Before starting the engine, he sure io unplug and
Slone the cord as it was before to keep It away
irom moving engine parts. If you don'L il could be
damaged
How long should you keep the cooiani heater plugged
In? The answer depends
on Ihe OLitside Ifirinperalure. the
kind qt qkl you hav&, and some other things. Instead
qt trying to Hsf everythirtg here, we ask that you contact
your dealer in the area where you'll ba pariiing your
vehicle. The dealer can give you lha best advice for that
particular area.
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