Oldsmobile 2003 Silhouette Owner's Manual page 338

Notice: Engine damage from running your engine
without coolant isn't covered by your warranty.
See "Overheated Engine Protection Operating
Mode" in the Index for information on driving to
a safe place in an emergency.
Notice: When adding coolant, it is important that
you use only DEX-COOL@ (silicate-free) coolant.
If coolant other than DEX-COOL@ is added to 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.
How to Add Coolant to the Coolant
Recovery Tank
If you haven't found a problem yet, but the coolant
level isn't at or above the FULL COLD mark, add a
50/50 mixture of clean, drinkable waterand DEX-COOL@
engine coolant at the coolant recovery tank. See Engine
Coolant on page 5-23 for more information.
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle's coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you wouldn't get the overheat warning.
V n ~ l r
e n ~ i n e
mt1ld
catch fire and
YOU
o r others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX COOL@ coolant.
5-31