Engine Coolant (Gas And Duramax Isuzu Engines) - GMC TopKick 2007 Owner's Manual

Engine Coolant (Gas and
®
DURAMAX /Isuzu Engines)
The cooling system in your vehicle is filled with
®
DEX-COOL engine coolant. This coolant is
designed to remain in your vehicle for five years or
150,000 miles (240 000 km), whichever occurs
first, if you add only DEX-COOL
life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have
a problem with engine overheating, see Engine
Overheating on page 286.
A 50/50 mixture of clean, drinkable water and
®
DEX-COOL coolant will:
•
Give freezing protection down to
−34°F (−37°C).
•
Give boiling protection up to 265°F (129°C).
•
Protect against rust and corrosion.
282
®
extended
•
Help keep the proper engine temperature.
•
Let the warning lights and gages work as they
should.
Notice: Using coolant other than
®
DEX-COOL may cause premature engine,
heater core or radiator corrosion. In addition,
the engine coolant may require changing
sooner, at 30,000 miles (50 000 km) or
24 months, whichever occurs first. Any repairs
would not be covered by your warranty.
Always use DEX-COOL
in your vehicle.
What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
®
(silicate-free) coolant
®
coolant which will