The Story of Dex-Cool: The Coolant That Put General Motors in Hot Water

Dex-Cool is the type of antifreeze most General Motors cars have used since the 1996 model year, and altered the original coolant formula to extend the lifespan of the coolant. At least, that was the plan…

While Dex-Cool wasn't the first coolant to stray from the traditional formulation, it did greatly help push other manufacturers to switch to modern formulations. Between 1996 and 2005, most manufacturers made a coolant formula switch.

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