L5P Duramax full delete kit with ECM unlock (2017-2023)
The 2017, 2018, 2019, 2020, 2021, 2022, 2023 L5P Duramax Delete Kit with ECM Unlock combines DPF, DEF, and EGR removal hardware with vehicle-specific tune calibration for Chevrolet Silverado and GMC Sierra 2500HD and 3500HD pickups. The exact ECM access process depends on the selected model year: 2017-2019 trucks use an E41 Upgrade and Unlock Tool, while supported 2020-2023 trucks are programmed without a separate ECM unlock device.
What's included in delete kit
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ECU Unlock Tool - The programming device connects a Windows 10 or newer laptop to the factory ECM through the OBD2 port. The interface reads the original calibration, generates the required vehicle data, and writes the supplied custom tune.
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Tuning Credits - The package includes the credits required to license the supported ECM and install the calibration on one truck. The credits are assigned to the supplied interface and can be activated through the Resync Interface function in VCM Editor.
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Custom Tune File - The custom calibration is created from the truck’s VIN, ECM serial number, MPVI serial number, stock file, infolog, tire size, and listed vehicle modifications. The available L5P tuner levels are Stock Optimized, +50 HP, +75 HP, +100 HP, and +150 HP.
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2017-2019 E41 Upgrade and Unlock Tool - The 2017-2019 configuration includes the hardware required to access and unlock the factory E41 ECM during the tuning process. The unlock tool can be used as part of the required read-and-write workflow before the custom calibration is installed.
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2020-2023 Tune Programming Interface - The 2020–2023 configuration uses an HP Tuners interface to read the stock file, generate the required infolog, and flash the supplied calibration. A separate E41 ECM unlock tool is not required for supported 2020–2023 applications.
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Optional TCM Tune – Available as an add-on for supported trucks. The transmission calibration adjusts shift scheduling, line pressure, torque management, and converter operation to match the selected ECM tune and vehicle setup.
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CAN Bus Plugs - The supplied CAN Bus plugs are installed during the programming process where required. The plugs allow the Tuner interface to communicate correctly with the supported L5P control system.
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DPF Delete Pipe or Complete Exhaust System - Сhoose a 4 inch exhaust, 5 inch exhaust, or DPF delete pipe configuration. Each option is available as a straight pipe or with a muffler. The selected system replaces the factory diesel particulate filter section, reduces exhaust restriction, and includes the configuration selected before purchase.
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Complete EGR Removal Hardware - The L5P EGR delete kit includes the required block-off components, fittings, gaskets, and hardware for removing or bypassing the factory exhaust gas recirculation system and EGR cooler.
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Installation and Programming Instructions - Detailed read and write instructions explain how to save the stock file, generate an infolog, submit the required information, activate credits, and flash the finished calibration.
The programming package is not preloaded. A custom tune must be prepared after the required vehicle files and identification details have been submitted.
What Changes Between 2017-2019 and 2020-2023 L5P Duramax Delete Kit?
|
What Changes |
2017-2019 |
2020-2023 |
|---|---|---|
|
ECM Access |
Requires the included E41 Upgrade and Unlock Tool. |
Uses the HP Tuners interface to read and flash the factory ECM. |
|
ECM Unlock |
E41 ECM unlock is required before programming. |
No separate ECM unlock tool is required for supported applications. |
|
Programming Hardware |
Includes the E41 Upgrade and Unlock Tool, HP Tuners interface, and tuning credits. |
Includes the HP Tuners interface, tuning credits, and required CAN Bus plugs. |
|
Tuning Workflow |
Unlock the ECM, read the stock file, generate the infolog, then flash the custom calibration. |
Read the stock file, generate the infolog, and flash the supplied custom calibration. |
|
SOTF Operation |
Supported through cruise-control buttons or an optional physical rotary switch. |
Supported through cruise-control buttons or an optional physical rotary switch. |
Identical on every 2017-2023 truck: custom ECM tuning, DPF, DEF, and EGR removal hardware, 4 inch, 5 inch, or DPF delete pipe configurations with straight-pipe or muffled options, plus an optional TCM tune for supported applications.
Vehicle compatibility
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Years: 2017, 2018, 2019, 2020, 2021, 2022, 2023
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Makes: Chevrolet, GMC
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Models: Silverado 2500HD / 3500HD, Sierra 2500HD / 3500HD
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Engine: 6.6L L5P Duramax Turbo Diesel
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Body style: Pickup
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ECM platform: E41
Performance & tuning
The L5P Duramax calibration provides several selectable output levels while correcting ECM operation after the factory DPF, DEF, and EGR equipment has been removed.
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No forced regens
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Improved throttle response
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More controlled towing power
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Potentially enhanced fuel economy
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Lower EGTs under comparable loads
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Reduced aftertreatment-related faults
Gains by power level
|
Power level |
+HP |
Best for |
|---|---|---|
|
Level 1 - Stock Optimized |
0 HP |
Factory-like power and work use |
|
Level 2 - Tow |
+50 HP |
Heavy towing and loaded driving |
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Level 3 - Daily |
+75 HP |
Daily driving and moderate towing |
|
Level 4 - Street |
+100 HP |
Stronger street performance |
|
Level 5 - Performance |
+150 HP |
Maximum available power |
Exact torque gains are not published as one fixed number because torque output depends on the supplied calibration, transmission strategy, vehicle condition, fuel quality, tire size, and installed modifications.
Performance summary
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Feature |
Typical change |
Important note |
|---|---|---|
|
Regeneration cycles |
Eliminated after correct hardware removal and tuning |
The factory particulate filter must be removed |
|
Throttle response |
Faster and more direct |
Results depend on the selected power level |
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Exhaust restriction |
Reduced after the factory DPF section is removed |
Results depend on the selected 4-inch, 5-inch, or DPF delete pipe configuration and whether a muffler is included |
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Exhaust gas temperature |
May be lower under comparable load |
Driving style and towing weight affect EGT |
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Fuel economy |
May improve under favorable conditions |
No fixed MPG increase is guaranteed |
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Towing response |
Stronger power delivery may be available |
Factory GVWR, GCWR, axle, and payload limits remain unchanged |
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SOTF tuning |
Five supported levels |
Calibration support must be confirmed for the truck |
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Transmission Tuning |
Optimized shift scheduling and line pressure (optional) |
Available only when "Add TCM Tune" is selected before purchase |
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Reliability |
Removes common aftertreatment failure points |
Existing mechanical problems are not repaired by tuning |
Available SOTF tuning allows the driver to move between supported power levels without reflashing the ECM. Cruise-control buttons can control the tune menu when the cruise-control master switch is off, or a compatible physical rotary switch can be purchased separately.
Which configuration should you choose?
The available exhaust and tune options allow the L5P full delete kit to be configured for different sound, airflow, and power requirements.
|
Option |
Choice |
Recommended For |
|---|---|---|
|
Exhaust System |
4″ Exhaust Straight Pipe |
Balanced pipe diameter with the loudest 4-inch exhaust note and no muffler restriction. |
|
Exhaust System |
4″ Exhaust with Muffler |
Daily driving and towing with reduced exhaust volume and less highway drone. |
|
Exhaust System |
5″ Exhaust Straight Pipe |
The deepest and loudest full-exhaust configuration with a larger pipe diameter. |
|
Exhaust System |
5″ Exhaust with Muffler |
A deeper 5-inch exhaust tone with reduced cabin drone and lower overall sound levels. |
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Exhaust System |
DPF Delete Pipe Straight Pipe |
Retaining the factory rear exhaust while replacing the DPF section without adding a muffler. |
|
Exhaust System |
DPF Delete Pipe with Muffler |
Retaining the factory rear exhaust while reducing sound through the included muffler section. |
|
TCM Tune |
No |
Customers who require ECM tuning only and want to retain the current transmission calibration. |
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TCM Tune |
Add TCM Tune |
Supported trucks requiring revised shift scheduling, torque management, line pressure, and converter behavior. |
How the delete kit works on your L5P Duramax
- Remove the factory DPF, DEF, and EGR components.
- Install the selected exhaust and EGR hardware.
- Read the original ECM file with VCM Editor.
- Generate and submit the required vehicle infolog.
- Flash the supplied custom tunes through the OBD2 port.
The calibration stops factory monitoring of the removed diesel exhaust fluid, particulate filter, and exhaust gas recirculation systems. Correct programming also prevents emissions-related reduced-power operation caused specifically by missing aftertreatment components.
Installation information
The L5P EGR delete kit and exhaust hardware include detailed mechanical and programming instructions. A customer with solid mechanical experience and basic Windows computer skills can complete the installation, but the stock file and infolog must be collected accurately before the tune is prepared.
The ECM serial number must begin with the correct identification sequence and must match the ECM installed in the truck. An incorrect ECM serial number can require the calibration to be rebuilt and may require purchasing another tune file.
Technical specifications
|
Specification |
Detail |
|---|---|
|
ECM platform |
E41 |
|
2017–2019 ECM access |
Upgrade and Unlock Tool |
|
2020–2023 ECM access |
HP Tuners interface; separate unlock tool not required |
|
Tune preparation |
Stock file + infolog + truck information |
|
Power levels |
0 / +50 / +75 / +100 / +150 HP |
|
TCM Tune |
Adjusts shift timing and torque management (optional) |
|
Exhaust options |
4″, 5″, or DPF delete pipe |
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Exhaust material |
Stainless Steel |
|
Muffler options |
Straight pipe or with muffler |
No More Emissions Codes
Correct installation and ECM programming disable supported diagnostic trouble codes associated with the removed DPF, SCR, DEF, and EGR systems. The calibration also removes supported emissions-related warning messages and reduced-power conditions when the faults are caused by the deleted factory equipment.
DPF System
|
Code |
Description |
|---|---|
|
P2002 |
Diesel Particulate Filter Efficiency Below Threshold |
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P242F |
Diesel Particulate Filter Ash Accumulation |
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P2452 |
Diesel Particulate Filter Pressure Sensor "A" Circuit |
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P2453 |
Diesel Particulate Filter Pressure Sensor "A" Circuit Range / Performance |
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P2458 |
Diesel Particulate Filter Regeneration Duration |
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P2459 |
Diesel Particulate Filter Regeneration Frequency |
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P2463 |
Diesel Particulate Filter Restriction - Soot Accumulation |
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P246C |
Diesel Particulate Filter Restriction - Forced Limited Power |
DEF / SCR System
|
Code |
Description |
|---|---|
|
P203B |
Reductant Level Sensor Circuit Range / Performance |
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P204F |
Reductant System Performance |
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P205B |
Reductant Tank Temperature Sensor Circuit Range / Performance |
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P207F |
Reductant Quality Performance |
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P208A |
Reductant Pump Control Circuit |
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P20B9 |
Reductant Heater "A" Control Circuit Open |
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P20BA |
Reductant Heater Performance |
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P20EE |
SCR NOx Catalyst Efficiency Below Threshold |
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P229F |
NOx Sensor Circuit Range / Performance |
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P249D |
Closed-Loop Reductant Injection Control at Limit - Flow Too High |
EGR System
|
Code |
Description |
|---|---|
|
P0401 |
Exhaust Gas Recirculation Flow Insufficient |
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P0402 |
Exhaust Gas Recirculation Flow Excessive |
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P0403 |
Exhaust Gas Recirculation Control Circuit |
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P0404 |
Exhaust Gas Recirculation Range / Performance |
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P0405 |
Exhaust Gas Recirculation Sensor "A" Circuit Low |
|
P0406 |
Exhaust Gas Recirculation Sensor "A" Circuit High |
|
P046C |
Exhaust Gas Recirculation Sensor "A" Circuit Range / Performance |
|
P2457 |
Exhaust Gas Recirculation Cooler Efficiency Below Threshold |
Send the truck's VIN, model year, ECM serial number, and modification list to our diesel specialists for confirmation of the exact hardware and calibration before ordering.