Chevrolet B7 2001 Owner's Manual page 134

Adding Coolant
If you need more coolant, add the proper DEX
coolant mixture at the coolant recovery tank or the
surge tank.
CAUTION:
Turning the radiator pressure cap (on a gasoline
engine) or the surge tank cap (on a diesel engine)
when the engine and radiator are hot can allow
steam and scalding liquids to blow out and burn
you badly. With the coolant recovery system,
you will almost never have to add coolant at
the radiator. Never turn the radiator pressure
cap or the surge tank pressure cap
--
little when the engine and radiator are hot.
If this light comes on and
stays on, it means you're
low on engine coolant.
-
COOL
--
even a
Add coolant mixture at the recovery tank or the surge
tank, but be careful not to spill it.
CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
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enough. Don't spill coolant on a hot engine.
Some conditions, such as trapped air in the cooling
system, can affect the coolant level in the radiator. If you
need to add coolant to the radiator, follow the steps
listed under "How to Add Coolant to the Radiator."
See "Engine Overheating" in the Index.
Engine Coolant (Caterpillar
Diesel Engine)
If your vehicle has a Caterpillar diesel engine, see the
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Caterpillar Diesel Engine Operation & Maintenance
Manual provided with your vehicle to find out what to
add, also when and how to service your cooling system.
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