In 2011, GM introduced the LML Duramax engine, which was installed on Chevy/GMC pickup trucks from 2011-2016. As emission laws become stricter each year, manufacturers are forced to install various emission components and systems to comply with these mandates. However, in practice and in the real world, these systems can cause more harm than good to the diesel truck industry. The DPF(diesel particulate filter)system is a common source of problems for diesel truck owners, and a DPF delete may be the solution. In this article, we will explain the ins and outs of the DPF system, and why deleting the DPF could be one of the best things you can do for your LML Duramax. We will cover the best DPF delete options, potential issues you may encounter, and the benefits of a delete capable tuner.

Emission System Components

The LMM Duramax, produced between 2011-2016, includes several components of the emissions system. Starting from the turbocharger, there is a short section of down pipe attached to the DOC (diesel oxidation catalyst). Behind that is the SCR (selective catalyst reduction), followed by the DPF, the muffler, and tailpipe section. The DEF (diesel exhaust fluid) tank is located outside the frame rail on the passenger side, and lines are routed to the exhaust for DEF injection into the system. If desired, all of these components can be removed using a DPF delete kit.

Understanding DPF

DPF, which stands for diesel particulate filter, is designed to trap small unburnt particles in its filter. During the regeneration cycle, the truck heats up the DPF to burn off these particulates. However, over time, the regeneration process becomes less and less effective. This leads to the DPF becoming clogged, which results in reduced fuel mileage, increased back pressure that strains the turbocharger, reduced drivability, and decreased horsepower and torque. A DPF delete kit, with the best DPF delete capable tune, is an effective solution to this problem.

What is the DPF and SCR

The LML Duramax is a powerful engine, but it has two systems that are prone to failure: the diesel particulate filter (DPF) and the selective catalyst reduction (SCR). The DPF is a filter that removes soot and other particulate matter from the exhaust. The SCR injects diesel exhaust fluid (DEF) into the exhaust to reduce NOX emissions. Unfortunately, both of these systems can be expensive to repair or replace.

DPF delete advantages & benefits 

If you’re looking for the best DPF delete solution for your LML Duramax, there are a few things to consider. First, you want to make sure that the DPF delete kit you choose is made in the USA and is specifically designed for the LML Duramax. Second, you want to make sure that the kit includes an amp CAT delete pipe, which will help to increase airflow and reduce back pressure in the exhaust.

DPF deleting  on your LML Duramax, you’ll enjoy a number of benefits. First and foremost, you’ll no longer have to worry about the DPF clogging or failing, which can trigger the check engine light and result in costly repairs. Second, you’ll notice an immediate increase in horsepower and torque, as the removal of the DPF and SCR will free up the exhaust and reduce back pressure. Additionally, you’ll enjoy improved fuel efficiency, lower exhaust gas temperatures while towing, and longer turbo life.

Finally, a DPF deleting will save you money in the long run. Not only will you avoid costly repairs and replacement of emissions system components, but you’ll also no longer need to use DEF, which can be expensive. Overall, if you’re looking to get the most out of your LML Duramax, a DPF delete kit is a smart investment.

DPF delete downsides and disadvantages

DPF deleting on your LML Duramax truck can offer some advantages, but it’s important to consider the potential downsides as well. Many shops will not install a DPF delete kit due to liability concerns, so you may need to do the installation yourself. It’s important to note that if you live in an area that requires emissions testing, you will need to reinstall the OEM components before performing the test. However, if they only check for a check engine light, you will be fine. The best DPF delete capable tuner for your truck will not set a check engine light. A DPF delete exhaust and amp cat delete pipe are also options to consider. It’s important to choose a DPF delete kit made in the USA, rather than one made in China, to ensure the best quality. While a DPF delete can improve performance, it may reduce the resale value of your truck and make it difficult to trade in, as many dealers prefer OEM components. Ultimately, it’s up to you to weigh the pros and cons of doing a DPF delete on your truck.

Will DPF delete void my warranty?

Yes, it is technically possible for dealerships to work on LML Duramax trucks that have had their DPF deleted, but it ultimately depends on the individual dealership. While some may refuse to work on modified vehicles, others may look past the modifications in order to perform warranty work. In fact, many service departments are aware that deleting the DPF can improve the engine’s longevity and reliability. Most problems that occur on the LML Duramax are related to the emissions system, which is eliminated by deleting the DPF. Therefore, the need for warranty work is significantly reduced. Additionally, many of these trucks are now over 10 years old and outside of the warranty period, making warranty concerns a non-issue. So, while some dealerships may refuse to work on deleted trucks, others may be more lenient, especially if the truck is outside of the warranty period.

What does a LML delete kit remove?

A complete delete for the LML Duramax removes the DOC, SCR, DPF, DEF & EGR. 

How to delete DPF on your LML Duramax?

Installing a DPF delete kit and tuner on your LML Duramax can be done with basic hand tools and a few hours of time. Using an automotive style lift can cut the time in half. All of the DPF delete kits we sell include everything you need for a complete installation, so no special trips to the hardware store are necessary. YouTube also has plenty of resources with step-by-step instructions for your specific vehicle.

Do you need DEF fluid after deleting the DPF?

No, doing a DPF delete and installing a DPF delete tuner will deactivate the DEF system, so you will no longer need to use UREA or DEF fluid. You can remove the tank completely or unplug the wiring harness and leave it installed. You may need to cap off the lines to prevent residual fluid from leaking.

Will a DPF delete cause a check engine light?

No, with the correct DPF delete capable tuner installed, you will not have any check engine light or diagnostic trouble codes set. Any previous codes set from emissions related issues will also be cleared after installing a DPF delete tuner. Deleting the DPF and installing a DPF delete kit and tuner is the best way to get the most out of your LML Duramax and eliminate any performance robbing restrictions.

Is Deleting Your DPF Worth It? 

We think it’s the best decision you can make for your truck. In fact, it should be the first modification you do when you drive it off the showroom floor. With the best DPF delete kit, you can boost fuel mileage and performance, making it a smart investment.

DPF Delete on LML Duramax Trucks – Fuel Economy Improvements

One of the primary advantages of doing a DPF delete on your LML Duramax truck is the fuel mileage gains. Depending on the condition of your existing DPF, you can expect to see a significant improvement in fuel efficiency. Typically, most drivers experience an increase in fuel economy from an average of 13-14 mpg to 18-20 mpg after deleting the DPF. However, tire size and driving habits can also impact the final mileage results.

Calculating the Return on Investment (ROI) for a DPF Delete

To better understand the potential benefits of a DPF delete, let’s look at a hypothetical example. Assuming that you currently spend around $5 per gallon of fuel, and you achieve a fuel efficiency improvement of 5 mpg after deleting the DPF, you would save around $41 every time you fill up a 30-gallon tank. This means that after driving around 540 miles, you could expect to save approximately $41 in fuel costs. After driving 15,000 miles, you could expect to save roughly $1,148 in fuel expenses.

Parts Needed for DPF Delete on LML Duramax

To remove the DPF on your LML Duramax, you will need a few key components. Here are the parts you need to complete a DPF delete:

DPF Delete Capable Tuner: A tuner is necessary to reprogram your truck’s computer after deleting the DPF. A DPF delete capable tuner will cost you anywhere from $800 to $1,500.

DPF Delete Pipe: A DPF delete pipe is necessary to replace the factory DPF. It costs around $300-$400.

Full Exhaust System (Optional): If you decide on a full exhaust system, you will need to spend $500-$1,000, depending on whether it’s made of aluminized steel or stainless steel.

The Cost of a DPF Delete: Depending on which direction you decide to go, a complete DPF delete setup will cost you anywhere from $1,200 to $2,500.

In summary, to complete a DPF delete on your LML Duramax, you will need a DPF delete capable tuner, a DPF delete pipe, and optionally a full exhaust system. The cost for the complete setup will depend on the components you choose.

Best DPF Delete Tuner for LML Duramax

When removing the DPF from your LML Duramax, tuning is required to prevent a check engine light, limp home mode, and DTCs from setting. The best DPF delete tuner for your truck will depend on the features you’re looking for.

Features to consider:

  1. Additional aftermarket modifications that need proper tuning
  2. Monitoring your truck’s parameters while driving
  3. Using your phone or tablet to change power levels and view gauges

Top DPF delete tuner options:

  1. EFI Live AutoCal – recommended if you have additional aftermarket modifications that require proper tuning.
  2. H&S Mini Maxx – recommended if you want a screen with gauges to monitor your truck’s parameters while driving.
  3. EZ Lynk Auto Agent – recommended if you want to use your phone or tablet to change power levels and view gauges.

While there are other tuning options on the market, we only offer the best of the best for the LML Duramax. Any of these three options will ensure that your truck’s DPF delete is performed properly and effectively.

Best EGR & Cat Delete Pipe

When it comes to EGR delete kits for the LML Duramax, we have extensive experience with every manufacturer on the market. Unfortunately, most of the options available now are low-quality products that are made in China. We strongly believe in sourcing only the highest-quality components, so we searched for a manufacturer in the United States that could produce a superior product. Our made-in-America EGR delete kit is simply the best option available for the LML Duramax.

Our stainless steel T409 DPF & CAT delete pipe is the best option for 11-15 LML Duramax trucks. Unlike other options on the market, our kit is made in the US and features a v-band clamp attachment for the downpipe. For 2015.5-2016 trucks, we offer a 3-bolt flange attachment option.

Best DPF Delete Exhaust

Our DPF delete exhaust systems are made by reputable manufacturers in Canada and offer superior quality compared to the imported options available on the market. Available in 4″ and 5″ options, they are the best choice for improving exhaust flow and performance.

To sum it up.

To conclude, our stance is clear. If you want to keep your LML Duramax for the long haul, installing a DPF delete kit is the best decision you can make. If you have read this far and have decided to go down that path, call to us for special proposal