2015.5-2016 Duramax LML

5 products

**DISCLAIMER: Deletes of emissions systems (DPF, EGR, SCR) are for off-road use only. You are responsible for local emissions regulations and road-legal compliance.** Shop premium 2015.5-2016 Duramax LML parts built for power and reliability. Whether you're tuning, deleting, or upgrading your 6.6L diesel, we stock the tuners, delete kits, and hard parts that work. Find your upgrade now.

2015.5-2016 Duramax LML Diesel Parts & Tuning Solutions

Your 2015.5-2016 Duramax LML 6.6L needs parts that match its potential. This generation sits at a sweet spot—newer emissions systems mean more tuning headroom, but stock restrictions still hold back horsepower and torque. We carry the exact upgrades diesel owners choose: tuners that delete DPF and EGR systems (diesel particulate filter and exhaust gas recirculation), delete pipes, and supporting hardware.

Tuners for Your LML Duramax

Start with a quality tuner. EFI Live Autocal V3 and Ez Lynk Auto Agent 3 give you real-time tuning control without a laptop—dial in your power tune, economy tune, or custom setup from your phone or on the dash. H&S Performance Mini Maxx rounds out the options with user-friendly interface and proven results on LML platforms. Each tuner handles DPF and EGR deletes with integrated code management so your truck runs clean diagnostically.

DPF & EGR Delete Kits

Delete pipes replace restrictive OEM components. Our DPF and CAT delete pipes for the 6.6L LML bolt in directly, drop soot loading to zero, and free up 15-25 hp on their own. Pair with EGR delete to eliminate cooler temperatures and carbon buildup. These are bolt-on confidence builders—no welding, no guessing.

Supporting Hard Parts

Up-pipes, gaskets, and intercooler piping round out a complete build. Quality gaskets prevent leaks; OEM-spec up-pipes handle turbo boost without cracking. Check our Duramax exhaust collection and Duramax tuning section for complementary upgrades.

Your LML is built tough. Give it the parts it deserves. Browse our 2015.5-2016 Duramax LML lineup and add to cart—we ship fast and stand behind every product.

Will a DPF delete void my truck's warranty?

Yes. Removing or deleting the DPF (diesel particulate filter) voids the manufacturer warranty on emissions-related components. For off-road use trucks, that's an acceptable trade-off. For street vehicles, check your local laws first—DPF deletes are illegal in many states.

What's the difference between EFI Live and Ez Lynk?

Both are solid tuners for 2011-2016 LML Duramax. EFI Live Autocal V3 is traditional, requires a laptop for initial tune files, and excels if you plan multiple custom tunes. Ez Lynk Auto Agent 3 is phone-based and faster to deploy. Pick EFI Live for flexibility; pick Ez Lynk for simplicity.

Can I install a delete kit myself?

Delete pipes bolt on in 2-4 hours with basic tools if you're comfortable under the truck. Up-pipes and gaskets take longer. Most shops charge $300-600 labor. If you've done suspension or exhaust work before, you can DIY. Otherwise, professional install ensures everything seals tight.

How much power do I gain from DPF and EGR deletes?

Expect 20-40 hp and 40-80 lb-ft torque over stock with deletes alone. Add a quality tune and you're looking at 60-100+ hp and 120-180 lb-ft gains depending on tune aggressiveness. Stacked with turbo upgrades, numbers climb higher.

Is a tuner required to delete the DPF?

Functionally, you can bolt on a DPF delete pipe without a tuner, but your truck will throw a check engine light and run in limp mode. A tuner deletes the fault codes and recalibrates fuel and timing for proper operation. Never delete without tuning.

What's the difference between 2011-2016 and 2015.5-2016 LML parts?

2015.5 (mid-2015) and 2016 LML models share the same core 6.6L engine. Most delete kits and tuners work across the full 2011-2016 range. Always verify fitment on the product page—some hard parts (up-pipes, specific gaskets) may be generation-specific.

Will deleting hurt my fuel economy?

Stock, your truck is tuned safe and efficient. A delete with a conservative economy tune maintains or slightly improves mileage by reducing backpressure and EGR heating. Aggressive power tunes will drop economy 1-3 mpg. Most owners accept that trade for the power gain.