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GM Duramax L5P – All-In-One DPF/DEF/EGR Delete Kit (2017-2023)

Sku: L5P-BundleU-20

This product fits:

2020-2023 GM Duramax L5P 6.6L Silverado 2500HD / 3500HD
2020-2023 GM Duramax L5P 6.6L Sierra 2500HD / 3500HD
$2,840.97
-0%
Shipping calculated at checkout.
Choose Your Year: 2020 - 2023
Choose your Exhaust System: Delete Pipe

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Notification for the incorrect product/variant will be listed here.

Click here to find the right tuner for your truck!
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🚨 REMEMBER 🚨

Within the device vehicle info section, look for the value with the text containing "14C204":
HC3A-14C204-ABH

Once you receive the device, please contact us with your serial number, VIN, and ECU strategy so we can create the custom tunes and send it to you for tuning your vehicle.

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Black Bandit Series 3 material image
T304 Stainless Steel

The Purest Stainless Steel used in Exhaust System Manufacturing

rust resistant icon

High Rust Resistance

Lasts up to 20+ years icon

Lasts Up To 20+ years

Looks better icon

Looks Better

Black Bandit title material-image
T409 Stainless Steel

The Standard Stainless Steel used in Exhaust System Manufacturing

rust prone icon

Low Rust Resistance

Lasts up to 20+ years icon

Lasts Up To 5-8 Years

Looks better icon

Looks Dull

Attention

A 2022 Cummins Tune Package was added to your cart. This tune is a beta tune that may cause the following:

  • Low power
  • Poor fuel mileage
  • Engine codes that may appear
  • Poor shifting characteristics

For a tested and proven tune, please view our Ram Cummins 6.7L All-in-One DPF/DEF/EGR Delete Kit w/ECM Swap (2022-2024)

Attention

You have added a product to your cart that requires the Service. This required additional service is NOT included in the price shown on TunerDepot.com. This means that you will be required to pay for the Service in addition to the product you have just added to the cart.

Introduction

The GM Duramax L5P – All-In-One DPF/DEF/EGR Delete Kit (2017–2023) combines tuner-ready hardware, year-correct EGR/cooler delete parts, and your choice of race exhaust for a complete off-road package. Tune the vehicle first, then remove emissions hardware. The Unlock Tool Upgrade eliminates full ECM swaps and simplifies setup.

Features

  • Pre-tune requirement: Load custom calibration before any physical deletes
  • Unlock Tool Upgrade: No ECM replacement, immobilizer, or crank relearn
  • OBD2 Flash Delete Tuning Interface: Includes 6 tuning credits
  • 5-Level SOTF power: 0 / 50 / 75 / 100 / 150 HP on-the-fly (with supported strategies)
  • Complete Duramax EGR delete kit and CAN BUS plug kit
  • Exhaust choices: Straight L5P DPF delete pipe, 4" Downpipe-back exhaust, or 5" downpipe-back exhaust

Benefits

  • Power & torque: Freer exhaust flow + calibrated fueling = instant gains
  • Lower EGTs: Reduced backpressure for safer temps while towing
  • Drivability: Smoother shifts and stronger mid-range with proper tuning
  • Reliability: Removes failure-prone emissions components; fewer derates
  • Simplicity: Unlock Tool Upgrade avoids ECM swaps and relearns

What’s Included in the All-in-One Delete Kit

  • Unlock Tool Upgrade — eliminates the need for complex ECU swaps
  • OBD2 Flash Delete Tuning Interface with 6 tuning credits
  • 5-Level SOTF (Switch-On-The-Fly) Tune Package — 0 HP, 50 HP, 75 HP, 100 HP, 150 HP
  • Complete Duramax EGR delete kit
  • CAN BUS plug kit
  • Your choice of exhaust: 4″ downpipe-back, 5″ downpipe-back, or straight L5P DPF delete pipe

Vehicle Compatibility

  • Platforms: 2017–2023 GMC Sierra / Chevy Silverado 2500–3500 L5P Duramax
  • Year / ECM notes:
    • 2017–2019: E41 ECM (Unlock Tool compatible)
    • 2020–2023: E86 ECM (Unlock Tool supported with updated procedures)
    • Select your year set during configuration: 2017–2019 or 2020–2023
Duramax L5P Delete Kit — Year and ECM Platform
Duramax L5P Delete Kit Model Year Platform
2023 Duramax L5P Delete Kit 2023 E86 ECM
2022 Duramax L5P Delete Kit 2022 E86 ECM
2021 L5P Delete Kit 2021 E86 ECM
2020 Duramax Delete Kit 2020 E86 ECM
2019 L5P Delete Kit 2019 E41 ECM
2018 L5P Delete Kit 2018 E41 ECM
2017 L5P Delete Kit 2017 E41 ECM

Technical Specifications

Kit contents (core package)

  • Unlock Tool Upgrade
  • OBD2 Flash Delete Tuning Interface (+6 credits)
  • 5-Level SOTF tune package (0/50/75/100/150 HP)
  • CAN BUS plug kit
  • Your choice of exhaust: straight DPF delete pipe, 4" DP-back, or 5" DP-back
  • Included EGR & cooler delete kit (L5P)
    • 3 × Coolant hoses with pre-installed fittings
    • 1 × Aluminum block-off plate
    • 2 × Steel block-off plates
    • 4 × Grade 8.8 bolts
    • 1 × Vacuum cap
    • 2 × Hose clamps
    • 3 × Exhaust gaskets
    • 3 × Turbo gaskets
    • 1 × Aluminum 9th-injector block-off plug
    • 1 × Aluminum coolant-hose block-off plug

Power gain range: tune-dependent; varies by supporting mods
Operating range: race use; sustained lower EGTs vs. stock when calibrated

Customization Steps

  1. Year Selection: 2017–2019 or 2020–2023 GM Sierra/Silverado 2500/3500 L5P Duramax.
  2. Exhaust System: Straight delete pipe (simple), 4″ Exhaust (performance), or 5″ Exhaust (maximum flow).

Traditional ECU Swap vs. Unlock Tool Upgrade

Comparison of Installation and Capabilities
Feature Traditional ECU Swap (E41 ECM) Unlock Tool Upgrade
Complex installation process Yes No
Replace ECM required Yes No
IMMO / crank relearn required Yes No
Core charge No No
Improved combustion temps ✅ ✅
Cooling & exhaust longevity ✅ ✅
Gains with powerful tune flashes ✅ ✅
On-the-fly power level change ✅ ✅
Included SOTF levels 0 / 50 / 75 / 100 / 150 HP 0 / 50 / 75 / 100 / 150 HP

Why it matters: The Unlock Tool Upgrade streamlines setup. No ECM swaps, no immobilizer resets, no crank relearns — same power potential with less hassle.

Shipping & Tuning Details

  • Lead times vary by configuration. Custom kits may require extra prep time before shipment.
  • Read the installation instructions before you begin. This helps prevent setup errors and delays.
  • Tuning and hardware setup can be complex. Thank you for your patience while we prepare your order.

Optional Add-Ons

Credits, Instructions & Help

Terms & Conditions apply. Please review the Shipping Policy and product Notes before purchase.

Installation & Notes

  • Order of operations: 1) Load tune first. 2) Confirm comms / clear DTCs. 3) Remove emissions hardware and install kit.
  • Difficulty: Moderate. Cutting may be required to remove stock exhaust. Verify wheelbase/hanger locations for 4"/5" systems.
  • No ECM swap needed with OBD 2 Tuner; no IMMO or crank relearn.
  • Re-torque clamps after first heat cycle; leak-check exhaust and coolant connections.
  • For off-road use only. Not street legal. Check applicable laws.
  • Image is for demonstration purposes only. Actual device may vary in color and branding.

Frequently Asked Questions

Will this work on my 2018 Sierra L5P?
Yes. Select the 2017–2019 option to build the correct 2018 L5P delete kit. Tune first, then install. Off-road use only.

Do I have to tune before installing the hardware?
Yes. Pre-tuning is mandatory. Load the calibration first to prevent codes and limp/derate.

Unlock Tool vs. ECM swap—what’s the advantage?
The Unlock Tool avoids ECM replacement, immobilizer, and crank relearn while delivering the same performance outcome when properly tuned.

Which exhaust should I choose: straight pipe, 4", or 5"?
Delete pipe = simplest; 4" = strong flow with easier fitment; 5" = lowest backpressure and sound headroom. All require tuning and are race-only.

Are the SOTF power levels included?
Yes. 0/50/75/100/150 HP levels are included; availability depends on vehicle strategy and installed calibration.

Important Product Information

Off-Road Use Only: The products sold on this website are intended for off-road use only, and may not be legal for use on public highways where pollution control laws apply.

Check Local Laws: Before purchasing and installing any of these parts, please check your local and state laws to confirm whether the modifications are legal in your area.

Professional Installation Recommended: These kits and parts are strongly recommended to be installed by professional mechanics only. Improper installation may lead to performance issues or damage to your vehicle. Unless specified differently on the product page, our parts do not include installation instructions. They are intended for individuals with a proficient understanding of mechanical systems and procedures. Like many aftermarket parts compatible with a variety of vehicles, minor adjustments or modifications may be necessary during the installation process. We cannot accept returns or offer refunds on the basis of an inability to complete the installation due to the absence of instructions.

Warranty: The use of these parts will void the warranty of your vehicle. Please confirm with your vehicle manufacturer before purchase and installation.

No Liability: Tuner Depot is not responsible for any damage or issues that may arise from the use of these parts.

Product Images: Product images are for illustrative purposes only and may differ from the actual product due to manufacturer design changes or improvements.

No Performance Guarantees: While these parts are designed to enhance the performance of your vehicle, no guarantees are made regarding the specific performance gains that will be achieved.

Shipping Policy at Tuner Depot

At Tuner Depot, we understand the importance of timely delivery for your performance parts. We're committed to ensuring a seamless shipping experience, striving to dispatch your orders with utmost efficiency and speed.

Our Shipping Policy: Our aim is to dispatch all orders within two business days, providing you with a quick and efficient processing time. However, unforeseen circumstances beyond our control may occasionally impact shipping times.
Factors Affecting Shipping:
  • Weather Conditions: Adverse weather conditions such as rain, snow, or sleet may affect delivery timelines. We will make every effort to minimize any delays.
  • Holiday Periods: Please note that our shipping center will be closed during holidays. We will resume shipping promptly on the next business day. Allow for potential delays during peak seasons, but rest assured, we will keep you informed every step of the way.
  • Staff Availability: Unforeseen circumstances can occasionally affect our staffing levels, possibly leading to minor delays. We are committed to swiftly resolving any issues to maintain our high standards of service.
We genuinely appreciate your understanding and patience during any unexpected obstacles. Be assured that we will utilize every resource available to deliver your performance parts promptly.