GMC 2007 Savana Van Owner's Manual page 307

Notice: Using coolant other than DEX-COOL
may cause premature engine, heater core,
radiator and fuel operated heater (FOH)
corrosion. In addition, the engine coolant may
require changing sooner, at 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
coolant in your vehicle.
What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
CAUTION:
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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.
®
(silicate-free)
®
coolant which will
CAUTION: (Continued)
®
CAUTION: (Continued)
With plain water or the wrong mixture, your
engine could get too hot but you would not
get the overheat warning. Your engine
could catch fire and you or others could be
burned. Use a 50/50 mixture of clean,
drinkable water and the proper coolant.
Notice: If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not be
covered by your warranty. Too much water
in the mixture can freeze and crack the engine,
radiator, heater core, and other parts.
If you have to add coolant more than four times a
year, have your dealer check your cooling system.
Notice: If you use extra inhibitors and/or
additives in your vehicle's cooling system, you
could damage your vehicle. Use only the proper
mixture of the engine coolant listed in this
manual for the cooling system. See
Recommended Fluids and Lubricants on
page 409 for more information.
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