6 Best Tuners for LML Duramax

Truck owners everywhere are always on the lookout for anything that will boost their Truck’s Performance, and a lot of them end up turning to truck tuners. Tuners can be a great way to boost performance, but not all tuners are the same, and some might decrease performance. The best tuners can provide  a better performance, more power, and improved fuel efficiency for LML Duramax trucks 

This article deep dives into the most popular truck tuners and their features designed explicitly for lml Duramax engines. We also explain some of the things you need to know before buying a tuner for your LML Duramax and how these differences can affect your driving experience. Let’s start with the most popular tuners in the market and then move on to some of the other things that might be better for your specific needs.

6 Best Tuners for LML Duramax

1- 85400 Edge Diesel Evolution CTS2

85400 Edge Diesel Evolution CTS2

  • Manufacturer: Edge Products
  • Model Name: ‎85400
  • Updates: Yes (Internet Updatable)
  • Display Size: 5″ Color touchscreen
  • Fuel Type: Gasoline and Diesel


85400 Edge Diesel Evolution CTS2 fuel tuners are explicitly made for Duramax engines. The fuel economy of the machine is a significant concern, which fuel tuners can improve on. All fuel tuners do not have the same fuel efficiency, but 85400 Edge Diesel Evolution CTS2 tuners are the best fuel tuners for diesel engines.

The Edge Evolution CTS2 is the ultimate engine tuner for your 2007-2018  models lml Duramax diesel truck! The Evolution CTS2 delivers unmatched horsepower, torque, and towing capability with industry-leading technology and innovation! With eight customizable screens, users can easily switch between popular screen layouts to display the information they need when they want it. In addition, the bright 5″ full-color swipe screen makes using the Evolution CTS2 easy and intuitive while driving.

If you’re looking to improve your Duramax’s fuel efficiency, then this is the product you need. With 85400 Edge Diesel Evolution CTS2 Duramax Tuners installed, we saw an increase in miles per gallon by over 10% means that your truck was able to go farther than before without needing more gas!

2- Bully Dog – 40420 GT Platinum Tuner

Bully Dog – 40420 GT Platinum Tuner

  • Manufacturer: ‎BULLY DOG
  • Model Name: ‎40420
  • Updates: No
  • Display Size: 2.4 inches
  • Fuel Type: Diesel


The BullyDog GT Platinum Tuner is a complete, all-in-one performance solution for your Ford, Dodge & GM Diesel truck, or SUV. Moreover, it features a powerful 4-channel tuner with a full-color display and advanced built-in diagnostics to deliver increased power and improved fuel economy.

The BullyDog features multiple preloaded tunes designed to improve your vehicle’s performance without sacrificing safety or durability. With the ability to add up to 10 custom tunes, this tuner offers unlimited possibilities for performance tuning (requires a USB thumb drive and custom tunes from a TB tuner). Additionally, the GT Platinum provides an additional 3rd CAN port, allowing users to add a seamless EVO-compatible transmission controller for automatic transmission equipped trucks. 

The integrated diagnostic system continuously monitors your engine without causing any damage or sabotaging factory warranties and providing peace of mind that your truck is running at maximum efficiency.

The BullyDog GT Platinum Tuner is a must-have for any diesel enthusiast looking to unlock the true potential of their vehicle.

3- DiabloSport 8245 inTune i3 Platinum Programmer

DiabloSport 8245 inTune i3 Platinum Programmer

  • Manufacturer: ‎‎DiabloSport
  • Model Name: ‎‎8245
  • Updates: Yes
  • Display Size: 2.8 inches
  • Fuel Type: Gasoline and Diesel


The DiabloSport inTune i3 Platinum Performance Programmer is a must-have for any vehicle owner. This plug-and-play tuner has worked with OBDII vehicles from 1996 to the present, allowing you to customize your Truck’s Performance without breaking the bank.

Furthermore, this tuner is a small, handheld tuner that allows you to adjust your vehicle’s parameters like tire size, speed limiter, shift points, and more. This device can also be used as an OBDII data-logger for recording performance metrics such as quarter-mile times. 

Moreover, inTune i3 Platinum Programmer features Wi-Fi capabilities so you can connect it to your smartphone or tablet using the free DiabloSport TunerView app for Android and iOS devices. You can also use this app to monitor performance and make changes without touching the device. 

The tuner comes with preloaded tunes optimized for different driving conditions. The daily driving tune is designed for optimizing fuel economy and minimizing emissions. There are also tunes for towing/hauling, performance, and extreme power that can be used as needed. 

Furthermore, the tuner is also upgradeable, so you can download new tunes as they become available for free through your smartphone or tablet. The tuner can support up to 16 custom tunes at once.

Compared to other tuners in its price range or less, the DiabloSport inTune i3 is the best value for your money. This tuner has all features that are essential for Duramax owners at a reasonable and competitive price.

4- Hypertech 32501 Max Energy Power Programmer

Hypertech 32501 Max Energy Power Programmer

  • Manufacturer: ‎‎Hypertech
  • Model Name: ‎‎32501
  • Updates: Yes
  • Fuel Type: Diesel
  • Item Weight: 0.95 lbs


Hypertech’s Max Energy Power Programmer is the most advanced tuner on the market. It features a powerful processor and an easy-to-use interface for quick, simple installation and setup.  

The Max Energy tuner gives you total control over your vehicle’s performance, allowing you to increase horsepower and torque, improve throttle response, correct engine timing, monitor vital engine data, and much more! 

Furthermore, it can be installed by anyone with basic mechanical skills. Installation takes just minutes using the included wiring harnesses.  

This new technology tuner allows you to optimize your engine tuning for maximum power and performance. Moreover, the tuner can also read and clear Diagnostic Trouble Codes (DTC’s) and be used as an auxiliary cooling fan controller. Moreover, this is internet updateable, allowing users to keep up with the latest engine management software updates.

Many fuel economy tools in the market promise fuel efficiency, but our experience and reviews from the other users with Hypertech 32501 Max Energy Power Programmer led us to believe it is the best fuel economy tuner available. 

5- SCT performance – 40490 – BDX Performance Tuner

SCT performance – 40490 – BDX Performance Tuner

  • Manufacturer: SCT Performance
  • Model Name: ‎‎‎40490
  • Updates: Yes
  • Fuel Type: Diesel
  • Item Weight: ‎15.5 ounces


SCT Performance BDX Performance Tuner is loaded with features and delivers the power to make your vehicle faster and more fun to drive. Tuner arrived with preloaded and performance tune files for a wide variety of cars, and this tuner stored up to 20 custom tuning files for Maximum tune flexibility. 

 Moreover, this SCT Tuner gives you real-time access to your engine’s vital statistics on a full-color display mounted anywhere you want it! Also, You can even transfer your engine’s data via Bluetooth or USB connection to view on your Windows-based computer device.

 Furthermore, this tuner is an ideal model for your LML Duramax trucks. It gives you better fuel economy by optimizing engine performance with no adverse side effects like other Duramax tuners have in the market. Plus, this Duramax tuner has an easy installation that can be done in ten minutes. 

Moreover, This fuel-efficient programmer will display a  fuel economy, driving range information, service engine soon indicator, high-speed cruising perimeters, coolant temperature gauge setting, and transmission temp gauge setting.

With incredible features and an affordable price range, SCT Performance BDX Performance is the Best Duramax tuner for truck owners looking to get more power out of their trucks while increasing fuel economy

6- Innovative Performance Chip/Power Programmer

Innovative Performance Chip/Power Programmer

  • Manufacturer: ‎Innovative Performance Chips
  • Model Name: ‎‎‎‎INV-CHVY-SLVRDO-DMAX
  • Updates: No
  • Fuel Type: Gasoline and Diesel
  • Item Weight: ‎‎5 ounces


The Innovative Performance Chip is one of the best diesel tuners because it’s a safe, easy-to-use tuner that boosts horsepower and torque and improves throttle response and fuel economy. The Innovative power programmer works by optimizing the air/fuel ratio and timing curve for increased fuel efficiency. Moreover, this tuner safely improves engine performance with no risk of engine damage or check engine light.

In addition, the Power tuner monitors the health of your vehicle continually and automatically compensates for any change in the engine’s performance.  The Power Programmer allows you to adjust many performance features of the engine. Features include the ability to change horsepower, torque, fuel economy, regen time, and frequency. 

Additionally, the tuner is the best way to get a performance boost for your vehicle without spending a ton of money. With this modern tuner, you can safely gain up to +35 HP and up to +5 MPG in fuel mileage in your vehicle!

The Installation is Simply plugged into your OBDII port (located under the dashboard) with no tools required. It’s that easy! The tuner comes pre-programmed with a mild calibration for fuel-efficient daily driving.

To Maximize your money by saving gas and extending the life of your vehicle’s engine – try an Innovative Power Chip/Power Tuner today!

Buying Guide for Choosing best tuners for LML Duramax

After taking an overview of some of the top tuners, now let’s take a deep dive in a buying guide so that you can choose one of the best tuners in the market for your LML Duramax, and we also explore some of the key points you should always consider before buying any tuners. Moreover, we also answer some of the common questions that are in your mind to save your precious time and money

What is LML Duramax?

The LML Duramax is a diesel truck manufactured by GM. It was first produced in 1990 and has been in production since then. Initially released in Mexico and later on, the production was brought to the US under the GMT800 platform. 

What are the differences between LML Duramax and GM 6.6L Duramax engines?

The GM 6.6L is an older diesel engine that produces more horsepower than its newer counterpart, the LML Duramax. The following are some of the significant differences between them:

Fuel starvation, emissions, and durability have all seen improvement with time on these engines.  The 6.6L had a roller cam, while the LML had a flat tappet cam which required different oils for maintenance purposes.

The injectors on both engines are entirely different from one another. The 6.6L Duramax had 4BAR high-pressure common rail injectors, while the LML had low-pressure Bosch VP44 rotary pump injectors.  

There are also tiny differences in how these two engines were built throughout their production runs, including minor internal and slight external changes, but these details will not affect performance.

9 Important things to think about before buying a tuner for lml Duramax

1- The engine configuration 

What engine configuration do you have? That’s is crucial as it affects how much power you can produce and if an aftermarket manifold will be compatible. LML is available in 1/2-ton trucks with either 2WD or 4WD, so ensure you know which one you have before placing your order. 

2- Turbo Selection

What is your goal with tuning? Of course, a tuner that has many different tunes to choose from is necessary if you want more power, but for everyday driving purposes, a stock or near-stock tune will do just fine. 

3- EGR Delete

Exhaust Gas Recirculation (EGR) is the system that injects exhaust gas into the intake manifold to lower combustion temperature and reduce NOX emissions. Moreover, it also happens to be one of the significant restrictions to power on Duramax engines, so removing it will allow your engine to breathe much more efficiently. 

4- Octane rating 

What octane rating are you planning on running? If 91+ is available, this should not be an issue as most tuners have tunes that support this octane level. However, if 94 or less is all you have, getting a tuner with adjustable timing settings and other performance features may do you little good unless you live in very flat areas without many inclines. 

5- Exhaust system

The stock exhaust manifolds are prone to cracking, so it is wise to get an aftermarket manifold that will last much longer under high heat conditions. You can also opt for a full turbo-back exhaust, but keep in mind that this may be too loud for some people living in urban settings. 

6- Horsepower Goals 

What are your horsepower goals? This question should always be asked when buying new parts because having the wrong tune or turbocharger could result in catastrophic failure of other engine components. If you want 300+ HP, then getting a tuner with the ability to support up to 400HP is necessary unless you plan on swapping out otherJengelco products.

7- Cooling system 

A simple turbo-back exhaust will not suffice if you want to produce more than 300 HP because it is necessary to get an intercooler and larger radiator at the very least. A tuner with adjustable timing features can help prevent overheating if a water/methanol injection system is not in the cards. 

8- Drivetrain setup 

What transmission do you have? It should be asked regardless of car or truck. Still, it becomes even more crucial when modifying a vehicle known for its lack of horsepower and torque before modifications since stock parts will quickly fail under increased loads. Also, what rear-end ratio do you have? If you have a 4L80E, a tuner with adjustable shift points and firmness levels is necessary. 

9- Aftermarket parts 

Do you plan on using any other aftermarket parts? If so, it may be best to get a tuner with the ability to adjust the timing of those parts instead of manually changing them every time an adjustment is made to your tuner, which could cause catastrophic failure.

Picking out the suitable Tuner for your LML can seem like a daunting task, but hopefully, following this in-depth buying guide will help you make the right decision when venturing into uncharted territory. First, of course, make sure that before anything else happens, you research as much information as possible and always do your due diligence by reading as many reviews as you can to end up with the suitable tuner and not a lemon.

4 Most Common Mistakes in Buying the Best tuner for lml Duramax

1- Not researching enough information 

There is a lot of misinformation about buying a tuner for an LML Duramax engine. Make sure that you do your research before committing to a purchase to avoid getting a useless tuner.

2- Not asking the right questions 

Before you make any purchase, ask yourself, “How much horsepower do I want?” “What octane rating is available where I live?” “Do I need an adjustable or performance tune for this tuner?”

These are some basic questions that should be asked before buying just about any type of tuning parts for your LML Duramax because these simple answers can help determine if this particular tuner will work for you or not.

3- Buying the lowest price without considering the quality

Many low-priced tuners on the market claim to have all types of fancy features, but very few are capable of delivering all they have promised. When around for a tuner, try to find one that is affordable and has multiple positive reviews.

4- Not reading enough reviews 

Always read reviews as many as you can before purchasing because seeing how others have liked or disliked their products may help you find the suitable tuner for your needs.

Frequently Asked Questions (FAQS)

1- How much HP can an LML handle?

No hard and fast number says that an LML can handle so much horsepower. The best way to find out is by researching your vehicle and the upgrades you want to make before making any purchase because all upgrade combinations will be different, and it’s always better to take your time than jump into anything.

2- How Often Should I Switch Diesel Tuner? 

It depends on what type of specific tune you are using. Still, if your LML Duramax wants an aggressive tune with lots of octanes, it would be wise not to swap tuners too often.

Additionally, this type of utilization may cause some parts inside the engine, especially the bearings, to start failing prematurely, eventually leading to catastrophic engine failure. Still, it’s always a good idea to switch tuners.

3- What is the difference between ECU Flashing vs. Tunes 

Both types of tunes can achieve the same results, but what makes them different is that an ECU flash physically alters the setup of your engine, which allows for better performance without taking any risks because your LML Duramax manufacturer will not void any warranty by using this kind of tune as long as you use reputable tuners such as one from Edge or Diablosport like those mentioned in this article.

Tunes, on the other hand, only adjust specific parameters inside your LML through special software and usually do not require physical modifications to your vehicle; however, it should be noted that most tuners, especially the more popular ones, are universal and can be used on any vehicle with little to no problems.

4- When Should I switch ECU Tunes? 

When you initially purchase your LML Duramax, it will come standard with an “economy” tune designed to limit horsepower to conserve fuel. Unfortunately, this is not good for performance enthusiasts.

It’s best to swap this type of tune away immediately after purchasing your truck because it only serves the purpose of saving you money at the pump by offering reduced engine power. Of course, you can always use this tuning for daily driving, but an upgrade is required if you intend to use your new LML for racing or heavy work.

5- Is the LML a good Duramax?

The LML is a great Duramax. If you are looking for a reliable and comfortable truck, the LML is perfect for you. The LML is also fuel-efficient, stylish, and affordable to maintain.

6- How can I get better gas mileage in my LML Duramax?

One of the best ways to get better fuel economy in your LML is to use cruise control whenever possible. Not using cruise control will result in higher mileage rates even if you drive at a constant speed.

7- How long will a Duramax LML last?

How long will a Duramax LML last depends on the type of work it is being used for. If you want to use your Duramax LML for heavy-duty operations, some precautions need to be taken.

Newer trucks may not last as long as older ones. It all depends on how you take care of it, but in general, most Duramax can last up to 10 years or more with proper maintenance

Final Verdict

Now that you know a little more about what to look for, it’s time to make your choice. with our personal experience, we have picked the top 3 best tuners below

  • DiabloSport 8245 inTune i3 Platinum Programmer, 
  • Bully Dog – 40420 GT Platinum Tuner and 
  • Hypertech 32501 Max Energy Power Programmer

If you consider buying a tuner for your LML Duramax, it’s essential to know what kind of driving experience you would like. We hope this in-depth article has provided valuable information about the most popular truck tuners and their features, specifically for lml Duramax engines. So which one tuner is best suited for your needs? Let us know in the comments below!

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