Best Tuners For 6.6L L5P Duramax (2017 – 2019)

| Last Updated: December 24, 2021

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So you got a new truck, and you’re really excited. You take it out on the highway and turn it loose – but what the heck? It’s still got some dead pedal issues! It’s a new vehicle, so what gives? What you need is a tuner. Read on to learn about how these amazing devices can wake your truck right up and take it to the next level.

Comparison of the Best 6.6L L5P Duramax Tuners (2017 – 2019)

  • Can be removed without leaving a trace
  • Makes a big difference in your truck’s towing
  • Increases both power and torque for your engine
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  • In-line, warranty friendly tuner that leaves no traces left in the PCM
  • Eight power levels, each level with its own purpose; performance, fuel economy, towing, or smoother driving experience
  • The Pulsar connects to the trucks PCM, eliminating tacky wiring and allowing the tuner to enhance the performance by optimizing many different parts' performance
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  • Provides extremely accurate, real-time parameter tracking
  • Up-to-date, capacitive touchscreen display with endless customization possibilities
  • Provides extremely accurate, real-time parameter tracking
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  • Installation should take no more than twenty minutes
  • Will increase both throttle sensitivity and responsiveness
  • Works for both stock vehicles and vehicles with modifications
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  • Fits easily into stock location on truck
  • Plug and play system will not void any warranty
  • Increases truck responsiveness and reduces turbo lag
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What Years Fall Under 6.6L L5P Duramax?

Trucks with 6.6L L5P Duramax engines are the most recent models GM was creating, so for many people, the search for a tuner is not because of a lagging older engine, but rather to unlock the power that they know is hidden inside their truck’s brand new engine system.

If you have an older vehicle, you will likely want to look elsewhere for compatible tuning systems. GM has been producing 6.6L L5P Duaramax engines since 2017, and the newest models, all the way up to the 2019 series, have these engines under their hoods.

Do Tuners Increase MPG?

We would love to say a resounding yes, that this is true for all tuners, every tuner on the market will increase your truck’s miles per gallon. But the truth is, it depends. Many of the newer tuners are recognizing the fact that for truck owners, gas mileage is one of the biggest economic considerations when buying a truck, and also that improved fuel economy is more environmentally responsible. With this in mind, more and more tuners are being designed to increase MPG. Some of these are featured on our list.

What Makes a Great L5P Duramax Tuner?

Great tuners have a number of qualities, including the following:

Fuel Economy

As mentioned above, fuel economy is becoming a more and more important consideration for today’s drivers. Good tuners can boost your fuel economy by several miles per gallon and save your wallet some well-deserved extra dollars. Maybe you can even invest in some cool modifications for your truck with the gas money you are no longer spending!

Improved Power

The crazy thing about the best tuners is that they are somehow able to combine increased fuel economy with increase engine horse power! You will finally be able to realize your truck’s full power with an excellent tuner from our list, and there will be no going back.

Ease of Use

Dealing with anything related to your truck can be complicated if you do not have a mechanic’s background. The best tuners will be straightforward and easy for the layperson to install, and then also not be too complicated to use or to adjust if you want to change something about your tuner’s functioning.  

Review of the Best L5P Duramax Tuners (2017 – 2019)

Keeping in mind everything you just learned about Duramax tuners, let’s check out some of the best products themselves:

Best Overall:
Banks Power Derringer Tuner


  • Easy to install
  • Increases fuel economy
  • Instructions are easy to follow
  • Will not increase your emissions
  • Banks provides good customer support


  • A little pricey

The Banks Power Derringer Tuner is an amazing tuner that will bring your L5P to life. This tuner will boost both your engine’s power and its torque, both of which will make a huge difference when it comes to towing loads of any size.

It is also an excellent diagnostic tool – it keeps track of a massive amount of data on your truck’s vitals, and it can be customized to display whatever data you believe is most relevant. And despite how hard it works for you, you will not have to worry about this tuner flaking out on your truck any time soon. 

Users report working with this tuner for over 10,000 miles and everything on their truck is still running great. Best of all, the Derringer can be removed without leaving any sort of trace, so you will not have to worry about the manufacturer discovering you have tuned your truck and subsequently voiding your truck’s warranty.

Bottom Line

The Banks Power Derringer Tuner is a great tuner that does pretty much everything you could ever dream of for your truck. The only thing it can’t do is adjust your truck’s speedometer to make accurate reads after you have installed modifications.

Edge Pulsar


  • Shift-on-the-fly capability for five power levels
  • Recalibrates the speedometer with the Edge Pulsar
  • The tuner has the ability to adjust the high-idle setting
  • Simple and clean installation without complicated wires
  • The Pulsar decreases power output if it detects transmission slip


  • Edge Pulsar cannot remove the speed limiter
  • Edge Pulsar adjusts the transmission, but it doesn't allow custom transmission tuning

What Other L5P Owners Are Saying

The Edge Pulsar installs easily over the PCM, and it's undetectable in terms of warranty disputes (when uninstalled, obviously). Shift-on-the-fly ability through cruise control buttons, and it has the option to disable MDS. The tunes are mild in terms of performance, but they feel 'healthy', offering a smooth driving experience. Overall, L5P owners using the Edge Pulsar are happy with the tuner.

Why it Stands Out to Us

The Edge Pulsar is an excellent in-line tuner that will optimize your truck's performance, throttle response, high-idle, fuel economy, and other crucial parameters. The tuner offers moderate power gains; Edge claims up to 90 horsepower and 156 torque with emissions systems intact. However, the Pulsar keeps your truck in warranty, leaving no traces in the ECU after removing the tuner for dealer services.

The installation is quite simple, and it leaves your truck looking clean. The tuner has eight different preset tunes; five have the SOTF option, utilizing the cruise control buttons. Monitoring the EGT, the tuner regulates power and prevents overheating, improving the longevity of your L5P Duramax.

Bottom Line

The Pulsar is a perfect tuner for the L5P Duramax will make driving that much more enjoyable. With other tuners, you'll have to worry about the warranty, but with Pulsar, you can enjoy the power gains without those drawbacks. Pairing the Pulsar with the Insight CTS3 will transform your truck into a performance machine.

Best Monitor-Only:
Edge Insight CTS3


  • Test Injector Balance Rates
  • Update the software with a Wi-Fi connection
  • Manual Regen is possible with the Insight CTS3
  • Compact cables for a clean look after installation
  • Compatible with a backup camera (EAS required)


  • Does not have tunes and cannot add them, monitor only
  • The screen can get damaged from constant exposure to sunlight

What Other L5P Owners Are Saying

The Edge Insight CTS3 is an excellent monitoring device; Extremely accurate, and it can track almost any vehicle parameter available. The display can match the style of your truck with so much customization potential. The installation was simple, and it resulted in a clean look.

Why it Stands Out to Us

The powerful Edge Insight CTS3 will allow you to track and monitor every part of your vehicle, including the regen status. It's also possible to do a manual DPF regen with the Insight CTS3. 

The device can handle data logging at high speeds, read and clear diagnostic codes, and test the 0-60 or quarter-mile time of your truck. The monitor does work with custom tuning products.

Customize the gauge layout, backgrounds, colors, and more, until you're satisfied with the look. Next to visual tracking, you can also set up custom audio alerts for PIDs.

Bottom Line

This is a superb user-oriented monitor for high-speed performance tracking. The Edge Insight CTS3 works excellent as a standalone monitoring device, and as a tracking device on high-performance trucks. Purchase the Insight CTS3, and monitor your truck in style.

4. Edge Amp’d Throttle Booster with On-The-Fly Power Switch


  • Improves fuel economy
  • Compatible with other Edge Tuning Devices
  • Increases throttle sensitivity and responsiveness
  • Can work on both stock vehicles and those with modifications


  • Can sometimes throw codes

The Edge Amp’d Throttle Booster with On-The-Fly Power Switch is an amazing tuner that can really take your truck to the next level. If your primary reason for wanting a tuner includes power boosting, you are not going to be able to find a tuner more effective than the Amp’d.

It has six different settings: stock; valet mode; low/economy, which boosts by 50%; medium, which boosts by 75%; high, which boosts by 100%; and finally, FEEL THE POWER, which boosts by an incredible 400%! All of that is included in a tuner with a simple installation process which should not take even a novice user any more than twenty minutes to complete.

This tuner is a total rock star and can do amazing things in a variety of settings, most notably passing, going uphill, and driving in stop and go traffic. Say goodbye to your power frustrations with the Edge Amp’d Throttle Booster!

Bottom Line

The Edge Amp’d Throttle Booster with On-The-Fly Power Switch is a fantastic tuner that will give you more power than you could ever have dreamed of. It can sometimes throw random codes, though, so be on the lookout.

5. BD Throttle Sensitivity Booster


  • Easy to use
  • Compatible with stock location on truck
  • Decreases turbo lag and increases throttle response
  • Has multiple different settings which are great for different road conditions


  • Will not actually increase horsepower or torque, is purely designed to make your throttle more responsive

The BD Throttle Sensitivity Booster is a wonderful add on tuner that will take your truck to the next level, even if you believe you have already maxed out your truck’s capabilities. We promise there is more to discover with the BD Booster! If your tuned truck is still experiencing some dead pedal issues, the Booster will clear those right up.

It works well with other programming systems, and because it is designed to be plug and play as needed, it will not leave traces in your engine that could void your vehicle’s warranty.

You can also upgrade this tuner to come with a push button option for the switch, which will arrive with more pre-programmed modes and have the ability to change modes while your truck is actually in motion. Tune your tuner with the BD Throttle Sensitivity Booster!

Bottom Line

The BD Throttle Sensitivity Booster is an excellent tuner if you are looking to clear up any remaining dead pedal issues. Because it is designed just to boost your throttle, it will not actually increase your truck’s horse power.

6. aFe SCORCHER BLUE Bluetooth Power Module


  • 4 Adjustable Tune Levels
  • Has a Bluetooth connection to a free smart phone app
  • Strikes a good balance between safety and increased power
  • Does not leave installation traces, so will not void your warranty


  • Cannot force regeneration cycles

The aFe SCORCHER BLUE Bluetooth Power Module is just about the newest, coolest technology you will be able to find on the tuner market today. It is Bluetooth enabled, so you will be able to connect your truck’s tuner with your smart phone, whether you have an iPhone or an Android. From that point on, you do not need to interface with the tuner itself at all – you can simply monitor your engine vitals or switch between tunes from your phone.

And of course, besides having Bluetooth capability, the aFe SCORCHER has some pretty awesome characteristics that go with a top notch tuning system, such as the ability to increase fuel pressure to boost your truck’s throttle response.

Its four tune settings are color coded and include Stock (Green), Sport (Yellow), Sport+ (Orange), and Race (Red). As mentioned before, you can switch between the different settings on your phone, even while your truck is moving! But please, no texting and driving.

Bottom Line

The aFe SCORCHER BLUE Bluetooth Power Module is the tuner of tomorrow. However, all that cool technology can be a little more difficult to set up.


If you want to take your new truck engine to the next level, you need to invest in a quality tuner. Evaluate the characteristics you want in your tuner, and then go with a top notch brand from our list here – we absolutely guarantee you will not regret it! And, we promise, your truck and truck’s engine will also thank you.   

Sean comes from the forums actually and drives an OBS Ford. He writes fantastic DIYs and knows his way around a camera, too. We keep him caffeinated and away from DPF filters to avoid another rant about recent emissions restrictions.