GM/Chevy Duramax

33 products

Quick Answers: GM/Chevy Duramax

  • What is the difference between an LML and LMM delete kit?

    The LMM (2007-2010) predates the SCR/DEF system GM added that with the LML in 201. An LMM delete kit covers EGR and DPF only. An LML kit also addresses the full SCR stack. They are not interchangeable.

  • Does a 2015 Duramax delete kit fit a 2016 Duramax?

    No, even though the truck VIN and your model on your insurance will say 2015 GM made a subtle change to the factory exhaust downpipe where the early model 2015’s have a V-band Clamp style and the 2015.5-2016 have a 3 bolt flange style attached. Best way to check and see what your 2015 Silverado or Sierra is by checking the connection piece on your truck. (To make it easier, turn your wheel to the driver's side and take a look under the truck from the passenger side).

  • What does a 2008 Duramax delete kit include?

    The 2008 Silverado and Sierra ran the LMM Duramax, which used a DPF and EGR system but no SCR or DEF injection that came in 2011. An LMM delete kit covers the EGR cooler bypass or block-off, a full delete exhaust, and a supporting tune. The LMM is a simpler delete than the LML.

  • Will deleting an LML Duramax cause any long-term engine issues?

    Done correctly with a proper tune, an LML delete typically reduces heat load on the engine. The EGR system recirculates hot, soot-laden exhaust gases into the intake removing it lowers intake charge temperatures and reduces piston ring and valve wear. Eliminating DPF regen cycles also removes the fuel dilution that occurs when raw diesel is injected to burn off soot.

The Duramax lineup on this page spans two very different engines: the LMM, built from mid-2007 through 2010, and the LML, built from 2011 through 2016. Both ran in the Chevy Silverado and GMC Sierra heavy-duty trucks, but GM redesigned the emissions system between them, the LML added the SCR/DEF setup that the LMM never had. The core delete hardware doesn't cross over between the two generations: an LMM truck and an LML truck need entirely separate tuners, EGR deletes, and exhaust components, no matter how close the model years look.

If your truck falls in the 2008, 2009, or 2010 range, you're working with an LMM the base GM/Chevy Duramax 6.6 LMM Full Delete Bundle for that generation starts from $2,134. 2011 through 2016 trucks including 2013, 2015, and 2016 model years run the LML instead, where the equivalent GM/Chevy Duramax 6.6 LML Full Delete Bundle starts from $1,990. The $144 gap between the two floors comes down to which parts each generation actually needs, not one bundle being more complete than the other.

This collection isn't only the two full bundles. A passenger-side up-pipe ($215) fits either generation outright, and universal add-ons stainless exhaust tips from $99, and Optimal Flow mufflers at $150 or $175 depending on pipe size work on top of an LMM or LML build alike. If you want to monitor boost and EGT (Exhaust Gas Temperature) after the delete, the Edge Insight CTS3 runs $575, or $819 with the EGT probe kit.

Because the LMM-to-LML switch happened mid-production, model year alone can be misleading the engine code stamped on your build sheet is the reliable way to know which parts you need. And removing certified emissions equipment carries real federal exposure regardless of how the truck is used the Clean Air Act test is about the vehicle's original certification, not where you drive it.