2024 Chevy Duramax Diesel Exhaust Fluid. 2011 thru 2024 chevy silverado/gmc sierra 2500hd/3500hd/4500/5500/6500 l5p/l5d & 2020 thru 2024 chevy. Learn how to refill the diesel exhaust fluid ( def) and how to change your fuel filter.

Fresh def helps ensure proper chemical conversion of nox in the exhaust system. While our guide will give you the manufacturer’s recommended fluid capacity for the l5p duramax, you always need to check your dipsticks and tank levels.