ACDelco GM Original Equipment Diesel Exhaust Fluid 10-4022

ACDelco 10-4022 is a 1-gallon diesel exhaust fluid meeting the ISO 22241 specification (32.5% urea in deionized water) made by Old World Industries, the same manufacturer that produces BlueDEF. The product carries the GM OE specification designation and states compliance with API regulations on the listing, though no API DEF Certification Program seal has been confirmed in the registry. The listing notes this part number as manufacturer-discontinued (replaced by the ACDelco Gold line), but the product remains actively available with strong inventory turnover. The Amazon listing explicitly states nozzles sold separately; purchasers who need a flexible pour spout for reaching the DEF fill port will need to source one independently. Community owners confirm concentration tests spot-on at 32.5%.

Best for diesel truck and SUV owners with GM vehicles who prefer staying within the OE parts line and already own a compatible pour nozzle. The smaller 1-gallon size also suits diesel passenger car owners who refill infrequently and want to avoid wasting a larger container before shelf life expires. Skip this product entirely if your vehicle is gasoline or hybrid-electric; DEF is only for diesel vehicles equipped with SCR systems and serves no purpose in any other application.

The SDS carries no GHS hazard codes and no signal word; urea in water at 32.5% is non-flammable, non-volatile, and without meaningful inhalation or skin-contact risk in normal pour use. A Prop 65 warning appears on the current product label; urea is not itself on the Prop 65 list, and no specific listed substance has been identified in the SDS composition data. Eye protection is appropriate when filling from an awkward position where splash is possible. DEF is consumed in the SCR catalyst converting NOx to nitrogen and water; the urea-water solution is biodegradable and carries no VOC or aquatic-toxicity classification.