2024 Chevy Duramax Diesel Exhaust Fluid Change. 6.6l duramax l5p maintenance schedule and service information, including service part numbers, oil and fluid specifications, and fluid capacities. From what i can figure it's because when removing the old tip, the venturi device is removed which will create out of spec exhaust pressures.

Follow these maintenance tips to ensure you can get all the benefits of a durable duramax diesel engine. Learn how to refill the diesel exhaust fluid ( def) and how to change your fuel.