2024 Chevy Duramax Diesel Exhaust Fluid Check. After 2010, diesel engines were required to use diesel exhaust fluid (def) to meet the strict nox emissions standards set by the epa. Learn how to refill the diesel exhaust fluid ( def) and how to change your fuel.
Service emissions with check engine light along with speed limited to 65mph in 175 miles popped up the other day. Follow these maintenance tips to ensure you can get all the benefits of a durable duramax diesel engine.