This coolant comes pre mixed so you dont have to add any distilled water to your cooling system when using AC Delco Dex-Cool 10-5027/12378390. Non-Silicate formula retains excellent heat transfer characteristics for improved water pump life. Also provides superior high temp protection for aluminum components. The AC Delco Dex-Cool provides effective anti corrosion support by protecting brass, cast iron, steel, solder, and copper components. The AC Delco Dex-Cool was the original fluid that comes in your 6.6L Duramax Diesel, it has been specially formulated for long service intervals, we recommend to service the coolant system every 5 years or 100,000 miles.
ACDelco Dex-Cool 50/50 Pre-Mix Engine Coolant/Antifreeze
