L5P Performance Tuner | 2017-2023 6.6L GM Duramax | Advanced Free Custom Tuning
SAVE $800+ WITH FREE TUNING
This tuning bundle for 2017+ Duramax L5P offers full control without ECM replacement. The CAN Plug simplifies tuning, while HP Tuner “Switch on the Fly” feature lets you change performance levels while driving, making it perfect for towing or performance adjustments.
FREE
$500
Lifetime Tuning Adjustments
FREE
$300
Premium Lifetime Support
FREE
$150
Express Shipping & Handling
FAQ
WHY WE OFFER FREE TUNING?
How are we able to provide tuning for free? The tuning map is created once and then adjusted based on each customer’s needs. For example, if a customer has made modifications in the past or wants something unique, we customize the tune accordingly. This process is the same regardless of where you buy the tune. As a company, we thought, “Why should we charge for something that doesn’t cost us much to produce each time?” It’s 100% possible to offer it for free, so why not do something different? Isn’t that the whole purpose of a company?
If a company is created just to replicate what already exists in the market without making any meaningful changes that benefit customers, why should it even exist? We believe in change, and we believe in providing exceptional value to our customers.
Do I get a single tune or a shift-on-the-fly tune?
The tune we offer with this bundle is a shift-on-the-fly tune. You can switch between five power levels in real time:
Level 1: Stock
Level 2: +50 HP
Level 3: +100 HP
Level 4: +150 HP
Level 5: +200 HP
NO NEED FOR A NEW ECM
Included in this kit is the HP Tuner, which allows you to unlock the ECM on 2017–2023 Chevy/GMC Duramax L5P vehicles. This tuner enable you to unlock the ECM directly through the vehicle’s OBD-II port. This eliminates the need to purchase and install a pre-unlocked ECM, reducing costs and simplifying the installation and tuning process.
Don't panic! We will send you detailed instructions. Plus, if you have any questions or get stuck during the installation, we've got you covered. Don't forget you have unlimited access to our professional tuning technicians.
Important Information about the Tune
How does tuning work?
Tuning involves adjusting your vehicle's engine control unit (ECU) to enhance performance, fuel efficiency, or other preferences. It can modify the way your engine performs by changing settings like fuel/air ratios, ignition timing, and turbo pressure.
How We Build the Advanced Custom Tune for You
When you get started with us, we’ll ask for a few details about your truck—like the VIN, make, model, and any unique setups. With that info, our tuning pros get to work, building a custom tune specifically for your truck. We’re talking about maximizing horsepower and torque and ditching those emissions system limits entirely. So, once it’s installed, no more dealing with DEF, no more annoying emissions lights popping up on your dash, and you’ll be able to tow some serious loads with confidence.
And here’s the best part: this whole process is all part of our service. No extra fees and we are the only company doing that.
What does the tuning device do?
The tuning device connects to your vehicle's OBD-II port and communicates with the ECU. It allows you to upload custom settings (or “tunes”) to adjust your engine's performance. These devices also allow for data logging, diagnostics, and monitoring of engine performance.
TRANSMISSION TUNING
Trans tuning is not included in this package, but we do offer it as an add-on. It's an additional $1300 and includes the TCM unlock. Reach out to us by phone or email, and we’ll be happy to send you a quote.
Your Vehicle Information
For these bundles, you will have a form to fill out once you receive your tuner. Installation instructions + form instructions will be emailed to you post purchase.
FITMENT
Fits 2017, 2018, 2019, 2020, 2021, 2022, and 2023 Chevrolet Silverado and GMC Sierra 2500HD & 3500HD models equipped with the 6.6L Duramax diesel engine. Compatible with all cab styles including Regular Cab, Double Cab, and Crew Cab — excluding Cab & Chassis configurations.
Shipping Time
We process and ship all orders within 1-2 business days to all U.S. states. Once shipped, delivery typically takes 5-8 business days, depending on your location.
You will receive a confirmation email with a tracking number once your order has been dispatched. Please note that delivery times may vary slightly due to carrier schedules or external factors beyond our control.
Tuning Process
For the tune installation, you need a laptop. The laptop must be a PC running Windows with at least Windows 7 or newer. Macintosh and Linux systems are not compatible.
Once you receive your HP Tuners device, plug it into your vehicle’s OBD-II port to get us your ECU stock file. Then, send us the file, and we will tune it and send it back to you. The process is pretty easy, and the entire installation takes about 30 minutes.
Don't panic! We will send you detailed instructions. Plus, if you have any questions or get stuck during the installation, we've got you covered. Don't forget you have unlimited access to our professional tuning technicians.
WHY DIESEL PATRIOTS
FREE CUSTOM TUNING
You get clean custom tunes for free - built for work and daily driving.
REAL SAVINGS
Eliminate thousands in long-term maintenance costs. One bundle, zero future headaches.
PATRIOT-POWERED
Built for Americans who love their trucks and know what real performance feels like.
SAVE UP TO $25,000
JUST BY DELETING YOUR EMISSIONS SYSTEM
Owning a diesel truck shouldn’t mean getting slammed with costs every year:
-$5,000 USD
SCR FAILURE
-$300 USD
DPF CLEANING
-$4,000 USD
DPF FAILURE
-$300 USD
EGR
-$5,000 USD
SCR FAILURE
-$1,500 USD
DEF SENSORS
-$5,000 USD
DEF FLUID
-$5,000 USD
DEF FLUID
AFTER DELETING YOUR TRUCK:
+$25,000 USD
ZERO EMISSIONS MAINTENANCE
REAL REVIEWS
FROM REAL DIESEL DRIVERS
