Engine Coolant - Chevrolet 2007 Colorado Owner's Manual

How to Check and Add Fluid
The proper fluid should be added if the level does
not reach the bottom of the diaphragm when it
is in place in the reservoir. See the instructions
on the reservoir cap.

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 five years
or 150,000 miles (240 000 km), whichever occurs
first, if you add only DEX-COOL
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 348.
®
extended life
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.
•
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
the first maintenance service after each
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 (silicate-free) coolant
in your vehicle.
®
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