Well what do you know, I'm probably looking at another engine replacement because the dexcool ate away the intake manifold gasket AGAIN. Had engine replaced because of this issue in April 2008 with 54000 miles.. Engine, radiator, gaskets,hoses all replaced. I was told that GM has made a better intake manifold gasket, what they didn't tell me is that it won't last much longer than the other. Obviously dexcool & plastic don't mix.I am now @ 88000 miles (34000)since the engine was replaced. I am having deja vu. Thermostat is bouncing up and down like crazy. Just waiting on the word how much it is going to cost this time. I AM SO DONE W/GM. NEVER, NEVER, NEVER AGAIN WILL I BUY A GM VEHICLE!!!!!!!

Had bought the car w/only 11,000 miles on it. Kept up on routine maintenance at dealer. At 54,000 miles the thermostat started bouncing up and down. Called dealer right away, they figured thermostat was stuck. Brought it in and they told me my engine was junk! oil in the coolant and coolant in the engine. Intake manifold let go because of the dexcool that eats away at the plastic on the gasket. Had to replace engine, radiator, hoses, gaskets. Just under $3000, good ol GM picked up half the tab. Personally, at 54,000 with PROOF OF ALL MAINTENANCE DONE SINCE DAY ONE THEY SHOULD HAVE PAID FOR THE WHOLE DAMN THING! Oh did I mention I had just been laid off from my job 2 weeks before. Was told that the intake manifold gasket was now "made better"hmmm, 38,000 miles into the new engine I am having deja vu. On to my next complaint!