I checked the owner's manual for the Z06, which may or may not be the same for other Corvettes, but I would guess it is the same for specs such as coolant:
Quote from page 6-23:
A 50/50 mixture of clean, drinkable water and DEX-COOL ( R ) coolant will:
* Give freezing protection down to -34 F -37 C
* Give boiling proection 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:
When adding coolant, it is important that you use only DEX-COOL ( silcate-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 or 24 months, whichever occurs first. Damage caused by the use of coolant other than DEX-COOL ( R ) is not covered by your new vehicle warranty
However. there have been reported problems with DEX-COOL, reference the web site:
http://www.imcool.com/articles/antif...l-macs2001.htm
The web site for WaterWetter, there is a down load with the tech info
http://www.redlineoil.com/products_coolant.asp