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  • For Off-Road Use Only
    Tuner Depot Accessories GM Duramax LML - CCV Upgrade Kit (2012-2016)
  • For Off-Road Use Only
    Tuner Depot Accessories GM Duramax LML - CCV Upgrade Kit (2012-2016)
  • For Off-Road Use Only
    Tuner Depot Accessories GM Duramax LML - CCV Upgrade Kit (2012-2016)
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GM Duramax LML - CCV Upgrade Kit (2012-2016)

Sku: ACC-CCV-GM-LML-2

This product fits:

GMC Sierra 2500HD (2012–2016)
GMC Sierra 3500HD (2012–2016)
Chevy Silverado 2500HD (2012–2016)
Chevy Silverado 3500HD (2012–2016)
$79.99
-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

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T304 Stainless Steel

The Purest Stainless Steel used in Exhaust System Manufacturing

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High Rust Resistance

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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

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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)

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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.

GM Duramax LML - CCV Upgrade Kit (2012–2016)

Take control of crankcase pressure and keep your intake system clean with this CCV Upgrade Kit for your 2012–2016 LML Duramax. The factory crankcase ventilation system is known to dump oily vapor back into the intake, leading to carbon buildup and reduced performance. This upgrade vents blowby properly, eliminates the bulky CCV box, and frees up valuable engine bay space—all while giving your setup a cleaner, more streamlined look.

Key Features:

  • Vents Blowby Pressure: Helps reduce crankcase pressure buildup for better engine health and performance.
  • Keeps Intake Tract Clean: Prevents oil mist from coating your intercooler and intake piping, preserving airflow and throttle response.
  • Deletes Factory CCV Box: Removes the unsightly OEM crankcase box, opening up room for easier maintenance and upgrades.
  • Streamlined Hose Routing: Simplifies your engine bay with a clean, direct hose setup.
  • Black Anodized Plates: Machined aluminum with a sleek black finish—built to last and look sharp doing it.

Why Upgrade Your CCV System?

On tuned or high-mileage trucks, crankcase pressure can become a serious issue. The factory system recirculates this pressure—along with oil mist—back through your turbo and intercooler. That leads to sludge, reduced efficiency, and long-term reliability problems. This CCV Upgrade Kit fixes the problem at its source, giving your Duramax cleaner airflow and better breathing.

Compatibility:

  • 2012, 2013, 2014, 2015, 2016 GMC Sierra 2500HD/3500HD 6.6L Duramax LML
  • 2012, 2013, 2014, 2015, 2016 Chevy Silverado 2500HD/3500HD 6.6L Duramax LML

Cleaner Look. Cleaner Performance.

This CCV Upgrade Kit is designed for performance, reliability, and ease of install. With anodized hardware and improved routing, it’s a smart upgrade that pays off in both form and function.

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.
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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.