How many know that GM settled a class action lawsuit over Dex-Cool coolant?
If you own or know someone who owns a GM vehicle with a 3.1L, 3.4L, or 3.8L engine and you/they have to use Dex-Cool, be prepared for a very pricey repair bill when the intake manifold gasket commits suicide on you.
I USED TO HAVE a 2002 Chevy Impala with a 3.4L engine. During a 12 month period I had to have the intake manifold gasket replaced twice and wound up forking over a total of $ 1500. The second time it happened it mucked up the valve lifters to the point where the mechanic had to use engine flush through the crankcase three times to ensure the crud was completely removed.
When it began showing sign of committing suicide for a third time I gave up and got rid of it - let someone else waste their money!