Refill the cooling system with a coolant meeting GM Specification 1825-M. To ensure sufficient engine cooling, freezing and corrosion protection, maintain the protection level at -37 C (34 F) or lower. Use a solution that is no more than 70 percent antifreeze. CAUTION: Under some conditions, the ethylene glycol engine coolant is combustible. To help avoid being burned, DO NOT spill antifreeze or coolant on the exhaust system or hot engine parts.
June, 2, 2010 AT 5:04 PM
There is a class-action lawsuit against GM. Apparently the DexCool that came from them when manufactures ate away at some seals. Do a google search on it.