ACDelco DEF Fluid 2.5 gal x2 — Gold Diesel Exhaust Fluid, ISO 22241-certified, OEM-grade

ACDelco Gold 10-4023 (19286292) Diesel Exhaust Fluid is a high-purity urea solution sold as two 2.5-gallon containers, formulated to support Selective Catalytic Reduction (SCR) systems by helping convert NOx into harmless nitrogen and water.

Designed for modern diesel engines equipped with SCR emissions control, this ACDelco DEF delivers a stable, colorless, aldehyde-free blend of high-purity synthetic urea and deionized water. It meets ISO 22241 purity and concentration standards and complies with API regulations and GM original equipment specifications, making it suitable for use in GM diesel vehicles and many non-GM diesels that require DEF. The product is non-flammable, non-toxic, and classified as minimum risk for transportation.

How does this DEF support my vehicle's emissions system?

ACDelco Gold DEF supplies the urea solution SCR systems need to chemically reduce nitrogen oxides (NOx) in exhaust gases. When injected into the exhaust stream, it helps convert NOx into nitrogen and water under catalytic conditions—supporting emission control systems without altering engine performance.

• Meets ISO 22241 for purity and concentration to protect SCR catalysts
• Formulated from high-purity synthetic urea and deionized water
• No chemical additives that could damage sensors or catalyst substrates

What purity and standards does ACDelco Gold DEF follow?

This DEF is manufactured to comply with strict international and manufacturer standards to ensure safe, effective operation. It satisfies ISO 22241 specifications, follows API guidelines, and meets GM original equipment requirements, so you can use it in approved vehicles with confidence.

• ISO 22241-certified composition for reliable SCR performance
• API-compliant formulation for broad industry compatibility
• Approved for GM OE applications and many non-GM diesels with SCR

How is the product packaged and poured to minimize spills?

Each order includes two 2.5-gallon containers designed for ease of handling. The units come with a vented pour nozzle to reduce glugging and one complimentary nozzle is included; additional nozzles can be purchased separately for convenience.

• Two 2.5-gallon jugs per pack for extended refill intervals
• Vented nozzle reduces splashing and air-lock during filling
• Complimentary nozzle included; extras sold separately for fleet use

Are there safety or transport considerations I should know?

ACDelco Gold DEF is non-flammable, non-toxic, and categorized as minimum risk for transportation, simplifying storage and shipping. Still, avoid freezing temperatures and contamination: keep containers sealed and use clean dispensing equipment to preserve fluid quality.

• Non-flammable and non-toxic formulation for safer handling
• Classified as minimum risk for transport; follow local storage guidelines
• Store sealed and protect from contamination or prolonged freezing

Who is this for: ACDelco Gold 10-4023 DEF is intended for owners and fleets operating diesel vehicles with SCR emissions systems who require a reliable, OEM-grade urea solution. It’s especially suitable for GM diesel owners seeking a product that meets GM OEM specifications, mechanics who refill DEF tanks for customers, and fleet managers who need ISO-compliant, easy-to-pour bulk DEF to reduce downtime and protect aftertreatment systems.