Cooling System - Hummer 2009 H3 Owner's Manual

5-22 Service and Appearance Care

Cooling System

The cooling system allows the
engine to maintain the correct
working temperature.
3.7L Engine
A. Coolant Recovery Tank
B. Engine Cooling Fan
C. Radiator Pressure Cap
5.3L Engine
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Cooling Fan
{
CAUTION
An electric engine cooling fan
under the hood can start up even
when the engine is not running and
can cause injury. Keep hands,
clothing, and tools away from any
underhood electric fan.
{
CAUTION
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not run the engine if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.
Notice: Using coolant other
®
than DEX-COOL can cause
premature engine, heater core, or
radiator corrosion. In addition,
the engine coolant could require
changing sooner, at 30,000 miles
(50 000 km) or 24 months,
whichever occurs first. Any
repairs would not be covered by
the vehicle warranty. Always
®
use DEX-COOL (silicate-free)
coolant in the vehicle.