Modern Dex-Cool, referenced as GM part number 12346290 (or 12377912), is an extended-life coolant that can last for up to five years or 150,000 miles (whichever comes first).

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ACDelco Dex-Cool antifreeze will keep your vehicle running at optimal temperatures. Extend the life of your water pump and other key systems by using a high-quality antifreeze from ACDelco. Jumpstart Your Next Project! Free Shipping - ACDelco Dex-Cool Antifreeze with qualifying orders of $109. Shop Antifreeze and Coolant at Summit Racing.

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One Gallon of concentrated ACDelco Dex-Cool coolant. Must be mixed 50/50 with distilled water. Good for 5 years or 150k miles.

12346290 ACDelco Dex-Cool Concentrated Engine Coolant, Antifreeze For 2001-2025 GM 6.6L LB7 LLY LBZ LMM LML L5P Concentrated Formula. The original fluid that comes in your 6.6L Duramax Diesel. Provides effective anti corrosion support.

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Pace Performance offers the best pricing on products offered by GM (General Motors). Including 12346290 - GM/AC Delco Dexcool Antifreeze Coolant - 1 Gallon.