Cadillac 2007 STS, Owner'S Manual

Page: 389 / 560

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
®
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 393 .
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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