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  • For Off-Road Use Only
    Tuner Depot EGR GM LML Duramax 6.6L - EGR Delete Shim Kit (2011-2016)
  • For Off-Road Use Only
    Tuner Depot EGR GM LML Duramax 6.6L - EGR Delete Shim Kit (2011-2016)
  • For Off-Road Use Only
    Tuner Depot EGR GM LML Duramax 6.6L - EGR Delete Shim Kit (2011-2016)
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GM LML Duramax 6.6L - EGR Delete Shim Kit (2011-2016)

Sku: EGR-GM-LML-SHIM

This product fits:

2011-2016 Chevy Duramax LML 6.6L Silverado 2500HD / 3500HD
2011-2016 GMC Duramax LML 6.6L Sierra 2500HD / 3500HD
$19.99
-0%
Shipping calculated at checkout.

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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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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

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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.

The GM 6.6L LML EGR Blocker Shim Kit offers a simple and affordable way to block off the EGR system on your 2011–2016 GMC Sierra and Chevy Silverado 2500/3500 HD trucks equipped with the 6.6L Duramax LML engine. This kit is made from durable stainless steel and requires emissions-off tuning for proper operation.

Key Features

  • Complete EGR Block-Off: Effectively disables the EGR system to prevent unwanted exhaust gases from re-entering the intake, helping reduce soot buildup and improve engine reliability.
  • Simplified Design: This kit uses precision-cut stainless steel shims—no complex components or modifications needed.
  • Durable Stainless Steel: Built to withstand high heat and corrosion, ensuring a long-lasting solution for EGR block-off needs.

Benefits

  • Budget-Friendly Upgrade: An inexpensive alternative to full EGR delete kits while still providing effective system shutoff.
  • Easy Installation: Just shims—no additional hardware or piping to install, making this one of the easiest EGR block solutions available.
  • Requires Emissions-Off Tuning: Designed for off-road or competition use only. Proper tuning is necessary to avoid engine codes or limp mode.

Installation & Compatibility

  • Vehicle Fit: Compatible with 2011–2016 GMC Sierra and Chevy Silverado 2500/3500 HD trucks equipped with the 6.6L Duramax LML engine.
  • Quick and Simple Install: Installs using standard tools and basic mechanical knowledge—ideal for DIY enthusiasts and professional shops alike.

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.