2024 Chevy Duramax Diesel Exhaust Fluid. But how much diesel exhaust fluid does the duramax hold? Duramax needs diesel exhaust fluid (def) to meet epa emissions standards.

Diesel exhaust fluid plays an important role in the emissions system on your diesel engine, but to better understand exactly what it does and why we need it, we need to provide a little context. Duramax needs diesel exhaust fluid (def) to meet epa emissions standards.