Chevrolet 2002 Corvette Owner's Manual page 259

NOTICE:
When adding coolant, it is important that you
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use only DEX COOL
If coolant other than DEX
the system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use of coolant other than DEX
covered by your new vehicle warranty.
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(silicate free) coolant.
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COOL is added to
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at
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COOL is not
How to Add Coolant to the Coolant
Surge Tank
If you haven't found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level isn't at the FULL COLD mark on
the coolant surge tank, add a 50/50 mixture of clean,
drinkable water and DEX
coolant surge tank, but be sure the cooling system,
including the coolant surge tank pressure cap, is cool
before you do it. See "Engine Coolant" in the Index
for more information.
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COOL coolant at the