To Use The Engine Coolant Heater - Hummer 2003 H2 Owner's Manual

When starting your engine in very cold weather
(below 0 _ F or 18 _ C), do this:
-
1. With your foot off the accelerator pedal, turn the
ignition key to START and hold it there up to
15 seconds. When the engine starts, let go of the key.
2. If your engine still won't start (or starts but then stops),
it could be flooded with too much gasoline. Try
pushing your accelerator pedal all the way to the floor
and holding it there as you hold the key in START for
about three seconds. When the engine starts, let go of
the key and accelerator. If the vehicle starts briefly but
then stops again, do the same thing, but this time keep
the pedal down for five or six seconds. This clears the
extra gasoline from the engine.
NOTICE:
Your engine is designed to work with the
electronics in your vehicle. If you add electrical
parts or accessories, you could change the way
the engine operates. Before adding electrical
equipment, check with your dealer. If you don't,
your engine might not perform properly.
2-22
Engine Coolant Heater (If Equipped)
In very cold weather, 0 _ F (
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.

To Use the Engine Coolant Heater

1. Turn off the engine.
18 _ C) or colder,
-
2. Open the hood and
unwrap the electrical
cord. The cord is
located on the
driver's side of the
vehicle near the
front recovery loop.