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Duramax tuning, built in-house

Us vs. them

  • Best pricing

    Diesel Patriots
    Best pricing. In-house tuning keeps our costs down.
    Other providers
    Outrageous prices. Tunes bought from third parties.
  • Decades of experience

    Diesel Patriots
    Engineers with decades of experience, including work with Duramax.
    Other providers
    They have no clue who makes the tunes—they’re not the ones making them.
  • Full support

    Diesel Patriots
    We stay with you until your truck is back on the road.
    Other providers
    Ghosted after placing your order.
  • Free changes

    Diesel Patriots
    Different tunes. Free adjustments.
    Other providers
    Extra charges may apply.

For custom tuning & tuning bundles. Other providers’ terms vary.

Know your kit

Questions, answered.

Need a hand? Call 877-355-3378

Fitment & ordering

WHATS INCLUDED?

Everything You Need to Delete Your Emissions System:

1) Ez Lynk device – comes with the package.

2) Custom tuning file – fully personalized to your vehicle and setup.

3) CAN bus plugs – included for seamless installation and communication.

4) 4” Stainless Steel DPF & CAT Delete Pipe – includes the option to add a downpipe if desired.

5) Complete EGR Delete Kit – everything needed for full EGR removal.

6) Optional 4” and 5” Stainless Steel Full Exhaust Systems – available as an upgrade.

7) Optional Muffler System – can be added if you are looking to keep your truck quiet.

Your EZ Lynk device ships preloaded with your custom L5P delete tune - built in-house for your specific VIN. Plug into your OBD-II port and you are ready to go. No additional software or loading steps required.

Fitment

This delete kit fits the following 2019-2023 GM/Chevy 6.6L L5P Duramax trucks:
2019 Chevrolet Silverado 2500HD - 6.6L L5P Duramax
2019 Chevrolet Silverado 3500HD - 6.6L L5P Duramax
2019 GMC Sierra 2500HD - 6.6L L5P Duramax
2019 GMC Sierra 3500HD - 6.6L L5P Duramax
2020 Chevrolet Silverado 2500HD - 6.6L L5P Duramax
2020 Chevrolet Silverado 3500HD - 6.6L L5P Duramax
2020 GMC Sierra 2500HD - 6.6L L5P Duramax
2020 GMC Sierra 3500HD - 6.6L L5P Duramax
2021 Chevrolet Silverado 2500HD - 6.6L L5P Duramax
2021 Chevrolet Silverado 3500HD - 6.6L L5P Duramax
2021 GMC Sierra 2500HD - 6.6L L5P Duramax
2021 GMC Sierra 3500HD - 6.6L L5P Duramax
2022 Chevrolet Silverado 2500HD - 6.6L L5P Duramax
2022 Chevrolet Silverado 3500HD - 6.6L L5P Duramax
2022 GMC Sierra 2500HD - 6.6L L5P Duramax
2022 GMC Sierra 3500HD - 6.6L L5P Duramax
2023 Chevrolet Silverado 2500HD - 6.6L L5P Duramax
2023 Chevrolet Silverado 3500HD - 6.6L L5P Duramax
2023 GMC Sierra 2500HD - 6.6L L5P Duramax
2023 GMC Sierra 3500HD - 6.6L L5P Duramax
Compatible with all cab configurations: Regular Cab, Double Cab, and Crew Cab. All bed lengths. Does NOT fit Cab & Chassis configurations. For 2017-2018 L5P Duramax trucks, see the HP Tuner delete kit bundle.

Your Vehicle Information

After purchase you will receive a form to fill out with your VIN, make, model year, and any modifications. Our in-house tuning team uses this information to build your custom 6.6L L5P Duramax delete tune and preload it onto the EZ Lynk device before shipping. When the device arrives, plug it into your OBD-II port - your tune is already loaded and ready. No software installation or additional steps required on your end.

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 & installation

Who makes your tunes?

Our tunes are made in-house by people who have worked with Duramax. We build and support the tuning for your truck ourselves.

Why we offer free tuning?

We build our tunes in-house, so we control the tuning costs. Different tunes and tuning adjustments are free with your tuning purchase.

Important Information about the Tune

How does tuning work?

Our tunes are built for real truck owners—people who tow, haul, or drive their rig every day. They're clean, reliable, and built in-house by pros who know what they're doing. No racing nonsense, just solid performance and better fuel economy.

For the 6.6L L5P Duramax, this means a tune built around eliminating DPF regen cycles, EGR soot buildup, and DEF system faults - the three failure points that define the 2019-2023 Silverado and Sierra ownership experience. Your tune arrives preloaded on the EZ Lynk device before it ships.

You give us the basics (VIN, make, model, and any mods), and we build a custom tune that fits your truck like a glove. Once it’s in, say goodbye to DEF headaches and warning lights. You’ll be ready to tow with confidence—and it’s all included, no extra fees.

What Does the Device Do?

The tuner plugs into your OBD-II port and loads your custom tune. It also lets you check performance, run diagnostics, and keep your truck dialed in.

Horsepower Settings (SOTF)

Shift on the fly (through the steering wheel):

Lev 1: Stock (0HP Added) Ideal for fuel economy, reliability, towing and daily driving

Lev 2:+50HP Ideal for fuel economy, reliability, towing and daily driving

Lev 3: +100HP Ideal performance

Lev 4: +150HP Ideal for Performance, modifications to truck may be required

Lev 5: +200HP Recommended only for modified trucks.

Important:

This is just what most customers want. If you’re looking for something different, just let us know on the form we send after your order—we’ll make it happen.

How hard is it to install the kit?

The kit is very easy to install. It usually takes about 4 to 8 hours, depending on how handy you are, but most of our customers do it themselves without any problem. We include clear, step-by-step instructions and give you all the help you need. If you have any questions, we’ll reply quickly so you can finish the job fast. The tuning device takes only about 4 minutes to install since it’s plug and play.

Support & care

Down Pipe Features

1- 3.5" Stainless Steel Piping

2- 20% better flow than the factory pipe

3- Heat wrap included keeping engine bay temperatures down

4-Greater heat-retention

5-Will not affect emissions systems

6-Maximum flow for competition applications

7- 4-bolt flange, two studs installed

8- Completely eliminates the DOC

Why Diesel Patriots

Free custom tuning

Worth $900, programmed for your VIN and included with your full bundle.

In-house value

We make our own tunes, keeping control of quality and cost.

Patriot-powered

Built around hardworking truck owners who expect power, durability and reliability.

More truck. Fewer repair bills.

See how emission-system costs can add up.

Illustrative costs · USD

DPF cleaning
$300
DPF failure
$4,000
EGR
$300
SCR failure
$5,000
DEF sensors
$1,500
DEF fluid
$5,000
Total of the examples shown $16,100

What our customers say

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