Duramax DEF Delete Kits Available Now
Three fitment-confirmed items cover this category today. The two LML kits handle DEF as part of a full emissions package, and the L5P connector supports the wiring side on newer trucks.
Which Duramax Trucks These Kits Cover
Engine code matters more than the Duramax badge here. The LML ran from 2011 through 2016, and the 2015.5-2016 trucks use different DEF hardware than the earlier LML years, which is why the full delete kits on this page call out that split specifically. The L5P arrived in 2017 and uses a different architecture again, with the CAN-Bus connector supporting that platform. If you are shopping a 2011-2015 LML, an LMM, or an earlier LB7, LLY, or LBZ truck, the DEF system either works differently or is not present at all, so start with your engine code and year rather than displacement alone. Send your year, model, and engine code if you are unsure which generation you own.
Why Duramax Owners Order From EngineGo
DEF work is where wrong-part orders get expensive, because the sensor and heater configurations changed across the platform. Every listing here names the exact years and engine code it supports and lists what arrives in the box. Orders ship from U.S. warehouses with most processing the same or next business day excluding Sundays, and free shipping applies within the continental United States. Authorized returns are accepted within 45 calendar days on qualifying items, with stricter terms on electrical and tuner products. If your Silverado or Sierra sits on a crossover year or already has emissions work done, send your details and support will confirm the fit before you pay.
Shop Duramax DEF Delete Kits
Check your engine code first, then your year. The LML full delete kits cover 2015.5-2016 trucks completely, and the L5P connector supports 2020-2023 applications. This category is smaller than our DPF and EGR ranges, so if you do not see your exact truck listed here, contact support with your year and engine code before assuming nothing fits. We would rather tell you what we do not have than sell you the wrong part.
Important: These products are intended for off-road, race, or non-public-road use where permitted. Confirm federal, state, and local laws before purchase and installation. Customers are responsible for legal compliance.
