Engine Coolant - Buick Lucerne 2007 Owner's Manual

How to Check Automatic Transaxle
Fluid (4.6L Engine)
For the 4.6L V8 engine, it is not necessary to
check the transaxle fluid level. A transaxle fluid
leak is the only reason for fluid loss. If a leak
occurs, take your vehicle to the dealership service
department and have it repaired as soon as
possible.

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 351.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
•
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
vehicle.
®
coolant will:
®
(silicate-free) coolant in your
®
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