GM Duramax L5P All-In-One DPF/DEF/EGR Delete Kit (2017-2025)
Type: All-In-One Kit
Introduction
GM Duramax L5P All-In-One Delete Kit (2017-2025) is built for owners who want a complete, tuner-ready off-road solution without piecing together hardware, tuning and exhaust from multiple sources. This L5P delete kit is designed to address the real-world issues every L5P owner runs into once mileage, towing, or aggressive use starts exposing the limits of factory DPF, DEF, and EGR systems. If you're tired of derates, rising EGTs, and emissions components that don't tolerate hard use, this kit gives you a clean path forward delete, tune, and move on.
Please Note: 2024 to 2025 L5P ECM's must be sent to HP tuners to be unlocked before it can be tuned (NOT INCLUDED)*
What's Included in the L5P All in One Delete Kit
| Items | Applicable Years | ||
|---|---|---|---|
| 2017 2019 | 2020 2023 | 2024 2025 | |
| Unlock Tool Upgrade | Included | Not required | Not available |
| OBD2 Flash Delete Tuning Interface | Included 6 credits | Included 6 credits | Included 8 credits |
| 5 Level SOTF Tune Package | Included | Included | Not available |
| Single Calibration Tune | Not available | Not available | Included |
| L5P EGR Delete Kit | Included | Included | Included |
| CAN BUS Plug Kit | Included | Included | Not available NOx and DEF must remain plugged |
| Exhaust Option | 4 inch downpipe back exhaust, 5 inch downpipe back exhaust or straight L5P DPF delete pipe. | ||
List of Items Included EGR & Cooler delete kit
- 3 √ó Coolant hoses with pre-installed fittings
- 1 √ó Aluminum block-off plate
- 2 √ó Steel block-off plates
- 4 √ó Grade 8.8 bolts
- 1 √ó Vacuum cap
- 2 √ó Hose clamps
- 3 √ó Exhaust gaskets
- 3 √ó Turbo gaskets
- 1 √ó Aluminum 9th-injector block-off plug
- 1 √ó Aluminum coolant-hose block-off plug
Everything included is chosen to work together: the tuning interface with the correct number of credits for your year, the appropriate tuning package, a full EGR and cooler delete, necessary block-off plates and hardware, exhaust gaskets, turbo gaskets and your selected exhaust configuration. If you want to take it further, optional TCM tuning and upgraded downpipes are available to refine shift strategy and maximize exhaust flow.
Important: 2024-2025 L5P models require E42 service, which is not included in this kit.
- Power gain range: varies by tune and supporting mods
- Operating range: designed for race use; lower EGTs when properly calibrated
Vehicle Compatibility
| Make | Chevrolet | GMC |
|---|---|---|
| Model | Silverado 2500HD / 3500HD | Sierra 2500HD / 3500HD |
| Year Range | 2017-2025 | 2017-2025 |
| Engine | GM 6.6L L5P Duramax Turbo Diesel V8 | GM 6.6L L5P Duramax Turbo Diesel V8 |
Year / ECM Notes
- 2017-2019: E41 ECM (Unlock Tool compatible)
- 2020-2023: E41 ECM (Unlock Tool supported with updated process)
- 2024-2025: E42 ECM - requires E42 service (not included in kit)
Select your year set during configuration: 2017-2019, 2020-2023 or 2024-2025
| Duramax L5P Delete Kit | Model Year | Platform |
|---|---|---|
| 2025 Duramax L5P Delete Kit | 2025 | E92 ECM (E42 service required) |
| 2024 Duramax L5P Delete Kit | 2024 | E92 ECM (E42 service required) |
| 2023 Duramax L5P Delete Kit | 2023 | E41 ECM |
| 2022 Duramax L5P Delete Kit | 2022 | E41 ECM |
| 2021 L5P Delete Kit | 2021 | E41 ECM |
| 2020 Duramax Delete Kit | 2020 | E41 ECM |
| 2019 L5P Delete Kit | 2019 | E41 ECM |
| 2018 L5P Delete Kit | 2018 | E41 ECM |
| 2017 L5P Delete Kit | 2017 | E41 ECM |
Fitment is year and ECM-specific, which is why you select your exact model range when ordering. 2017-2019 trucks use the E41 ECM and are fully compatible with the Unlock Tool process. 2020-2023 duramax l5p engine trucks still run E41 hardware with an updated unlock procedure. 2024-2025 trucks use the newer ECM platform and require external unlock service before tuning. This attention to platform differences is what separates a complete l5p duramax delete kit from a generic bundle of parts.
Customization Steps
- Year Selection: 2017-2019, 2020-2023, or 2024-2025 GM Sierra/Silverado 2500/3500 L5P Duramax.
- Exhaust System: Straight delete pipe, 4″ Exhaust or 5″ Exhaust for maximum flow.
| Feature | Traditional ECU Swap (E41 ECM) | OBD 2 Tuning Interface |
|---|---|---|
| Complex installation process | Yes | No |
| Replace ECM required | Yes | No (for 2017-2023) |
| IMMO / crank relearn required | Yes | No |
| Core charge | No | No |
| Improved combustion temps | ‚úÖ | ‚úÖ |
| Cooling & exhaust longevity | ‚úÖ | ‚úÖ |
| Gains with powerful tune flashes | ‚úÖ | ‚úÖ |
| On-the-fly power level change | ‚úÖ | 2017-2023 only |
| Included SOTF levels | 0 / 50 / 75 / 100 / 150 HP | 2017-2023 only |
Note: 2024-2025 duramax tunes are single calibration only and require separate E42 service. No SOTF options available.
Features
- Pre-tune requirement: Always flash the calibration before removing hardware
-
Unlock Tool Upgrade:
- 2017-2023: Unlock Tool Upgrade included (No ECM replacement, immobilizer, or crank relearn)
- 2024-2025: HP Tuners unlock service required (ECM's must be sent to HP tuners to be unlocked before it can be tuned, service not included with this product) -
OBD2 Flash Delete Tuning Interface:
- 6 credits for 2017-2023
- 8 credits for 2024-2025 - 5-Level SOTF tuning package (2017-2023 only): 0HP / 50HP / 75HP / 100HP / 150HP Switch On The Fly
- Complete Duramax EGR Delete Kit
- CAN BUS plug kit (2017-2023 only)
- 2024-2025 variant is a single calibration tune (no SOTF)
- Exhaust options: Straight L5P DPF delete pipe, 4" downpipe-back exhaust, or 5" downpipe-back exhaust.
Benefits
- Power & torque: Optimized fueling + free-flowing exhaust = instant gains
- Lower EGTs: Less restriction keeps temps safer under load
- Drivability: Smooth shifts and stronger mid-range with custom tunes
- Reliability: Deletes failure-prone emissions parts, reducing derates
- Simplicity: Unlock Tool Upgrade avoids ECM swaps and relearn steps
Shipping & Tuning Details
- Lead times depend on year and configuration. 2024-2025 kits may require additional prep due to E42 service requirements.
- Review the installation instructions before beginning.
- Tuning and hardware setup are detailed processes. We appreciate your patience during order preparation.
Optional Add-Ons
-
Discover the TCM Tuning Upgrade Kit : Improve shift strategy and drivability.
-
GM Duramax L5P 3.5" Down-Pipe : Helps maximize results by removing the DOC after the turbo.
Important Notes:
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Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
