There appears to be an issue with GM's Dex-Cool engine coolant. Consumers
have had problems with the cost of repairs as a result of the Dex-Cool
antifreeze not working as it was supposed to. If you check out
http://www.lawyersandsettlements.com/case/dexcool2 they have the information
and what you can do about it. There is also a free case evaluation for those
who have had problems with this product. I hope this might be of some help.
The Malibu I used to have had the recommendation in the manual of 5 years or
100K miles before a coolant flush. My guess is that people should NOT
follow the recommended flush intervals and actually do it with greater
frequency than recommended.
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