In the 1990s, GM introduced an engine coolant called Dexcool.
Can you add regular coolant to Dex-cool?ĭo not mix Dex-Cool with regular anti-freeze! Dex-Cool is a specially formulated GM coolant which will not mix with traditional coolants, and was used in various GM applications up through the 2004 model year. What kind of coolant is Dexcool?ĪCDelco GM OE Dex-Cool Antifreeze Extended Life Coolant Concentrate is an orange, silicate and phosphate free, premium-grade coolant/antifreeze that is formulated with a chemical composition that minimizes breakdown of metal components in contact with the fluid. Despite not being called antifreeze, it still accomplishes the same task, so you don’t have to worry about replacing Dex-Cool for the winter months or anything like that. The green and orange coolants do not mix.įor a couple decades now, GM has used a type of coolant known as Dex-Cool.
Extended coolant life, often for the whole life of the engine or vehicle, is obtained through the use of virtually non-depleting corrosion inhibitors. ACDelco DEX-COOL® is an ethylene glycol based fluid that provides maintenance-free protection against freezing and boiling but also against corrosion.
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