Engine Coolant - GMC 2003 GMT560 T-Series Owner's Manual

Engine Coolant

The cooling system in your vehicle is filled with
®
DEX-COOL engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs first, if you add
®
only DEX-COOL extended 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 5-20 .
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 252°F (122°C).
•
Protect against rust and corrosion.
•
Help keep the proper engine temperature.
•
Let the warning lights and gages work as they
should.
Notice: When adding coolant, it is important that
you use only DEX-COOL
If coolant other than DEX-COOL
the system, premature engine, heater core or
radiator corrosion may result. In addition, the engine
coolant will require change sooner -- at 30,000 miles
(50,000 km) or 24 months, whichever occurs first.
Damage caused by the use of coolant other
®
than DEX-COOL is not covered by your new vehicle
warranty.
®
(silicate-free) coolant.
®
is added to
5-17