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  • For Off-Road Use Only
    Tuner Depot Tuning GM Duramax LM2 – ECM E46 Upgrade & Unlock Service (2020-2023)
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GM Duramax LM2 – ECM E46 Upgrade & Unlock Service (2020-2022)

Sku: DT-HP-E46-US

This product fits:

2020-2022 Chevy Duramax LM2 3.0L Silverado 1500
2020-2022 GMC Duramax LM2 3.0L Sierra 1500
Not compatible with E66 ECMs found in the late 2022 models and newer
$550.00
-0%
Shipping calculated at checkout.

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

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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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T304 Stainless Steel

The Purest Stainless Steel used in Exhaust System Manufacturing

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High Rust Resistance

Lasts up to 20+ years icon

Lasts Up To 20+ years

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Looks Better

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T409 Stainless Steel

The Standard Stainless Steel used in Exhaust System Manufacturing

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Low Rust Resistance

Lasts up to 20+ years icon

Lasts Up To 5-8 Years

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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.

For off-road use only

Image is for demonstration purposes only. Actual device may vary in color and branding

Send-In ECM Upgrade & Unlock Service

E46 ECM tuning for Duramax LM2 trucks offers a convenient service to unlock and upgrade your ECM. This process, designed for 2020-2022 Chevy Silverado and GMC Sierra 1500 3.0L Duramax (LM2) models with the E46 ECM, not compatible with E66 ECMs found int he late 2022 models and newer. The streamlined service ensures minimal downtime, making the upgrade fast and efficient.

Service Highlights

  • Hassle-Free Upgrade: Simply send in your ECM to our facility. We handle the unlocking and upgrading process and then ship it back to you, ready for installation.
  • Quick Turnaround: Our streamlined process ensures your ECM is upgraded and back in your hands quickly, minimizing downtime for your vehicle.
  • No Physical Modification Needed: Avoid the risks associated with ECM removal, such as breaking tabs or potential damage during transit.
  • Advanced Diagnostics and Tuning: Once upgraded, your ECM will support advanced diagnostics and tuning capabilities. Enjoy the ability to read, write, and perform special functions using our specialized computer software with an OBD2 Flash Delete Tuning Interface.
  • Industry-Leading Write Times: Experience quick write times to get your vehicle back on the road faster.

Upgrade E46 ECM tuning for Duramax LM2  from the Comfort of Your Home

With our Send-In ECM Upgrade & Unlock Service, both DIY enthusiasts and professional tuners have the perfect solution to enhance their truck's ECM without stepping into a shop. This service includes everything from the upgrade to the comprehensive diagnostics package, offering:

  • No IMMO relearn required
  • No crank relearn necessary
  • No need to perform the “Replace ECM” function

What You Need to Do:

  1. Send your ECM using the shipping guidelines provided.
  2. Once received, our team will perform the upgrade using state-of-the-art equipment and software.
  3. We'll ship your upgraded ECM back to you, ready for easy reinstallation.

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.

Returns & Refunds: All sales of exhaust pipes, straight pipes, and engine pipes are final and Non-Returnable and Non-Refundable.

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.