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Media gallery For Off-Road Use OnlyMedia gallery
GM Duramax 6.6L LML - CP3 Conversion Kit (2011-2016)
Fuel pumpThis product fits:
- Regular price
- $599.99
- Regular price
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$799.99 - Sale price
- $599.99
- Unit price
- / per
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DESCRIPTION
DESCRIPTION
Duramax LML CP3 Conversion Kit upgrades your 2011-2016 Duramax 6.6L engine by replacing the failure-prone CP4 fuel pump with a more dependable CP3 pump enhancing both performance and reliability. Can be used with OEM CP3 pump or aftermarket recalibrated pump. Pump choice determines if tuning is required.
Vehicle Compatibility:
Specifically designed for 2011, 2012, 2013, 2014, 2015, and 2016 6.6L GM Duramax engines.
Features:
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CNC-Machined Filter Block:
- Crafted from solid billet 6061 aluminum for durability and precise fitment.
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High-Strength Silicone Hoses:
- Abrasion-resistant hoses are pre-assembled for leak-proof connections, tested to withstand more than double the recommended pressure at the radiator cap.
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Easy Installation:
- The anodized aluminum filter head attaches to a supplied bracket that mounts directly to factory holes, ensuring a hassle-free setup.
Duramax LML CP3 Conversion Kit Includes:
- Coolant Filter
- Filter Block
- Mounting Bracket
- Silicone Hoses
- Installation Hardware
For Off-Road use only.
PLEASE NOTE!
PLEASE NOTE!
- 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. Please note that, unless specified differently on the product page, our parts do not include installation instructions. Our components 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
Shipping Policy
At Tuner Depot, we understand the importance of timely delivery when it comes to your performance parts. We are 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, please bear in mind that unforeseen circumstances beyond our control may occasionally impact shipping times.
Factors Affecting Shipping:
Weather Conditions: While we pride ourselves on our fast and efficient order processing, adverse weather conditions such as rain, snow, or sleet may affect delivery timelines. We assure you that we will make every effort to overcome such challenges and minimize any delays.
Holiday Periods: Even our dedicated team needs a well-deserved break during holidays. Please note that our shipping center will be closed on such occasions. Rest assured, we will resume shipping promptly on the next business day. During peak holiday seasons, please allow for potential delays, but be assured that we will keep you informed every step of the way and work diligently to deliver your order as swiftly as possible.
Staff Availability: While we have an exceptional team, we recognize that unforeseen circumstances can occasionally affect our staffing levels. In such cases, we may experience minor delays. However, we want to assure you that we are committed to swiftly resolving any staffing issues and maintaining our high standards of service.
We genuinely appreciate your understanding and patience during any unexpected obstacles we may encounter along the way. Be assured that we will utilize every resource available to deliver your performance parts to you promptly.
Thank you for choosing Tuner Depot, where our passion fuels our commitment to outstanding customer service.
Happy tuning!

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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)
The experience i had on the website was great. Order process easy. Great communication. If i would recommend changing anything it would be the way they package exhaust pipes.
Ryan Threet
Sept 7th, 2023
The dealer could not fix my truck they said the parts were on backorder for my emission system I called tuner Depot they sell me the parts I needed to delete my truck best choice I've ever made.
Rick Rhodes
Aug 31st, 2023
Micaiah Combs
July 22nd, 2023
Larry Elliot
Sept 2nd, 2023
John Glines
May 17th, 2023
Easy worked out fine without any issues, would definitely recommend doing business with them I called in and the guy was very helpful.
Zach Pringle
April 9th, 2023
Just got this today and setting it up was so easy. I have ordered from another company but had to return twice but the quality of this product is amazing, screen is well lit, and it is an amazing tuner.

Gary Jenson
May 6th, 2024
Bought a full kit for my 2017 Ram 2500 and everything fit perfect. The hangers lined up right and the truck sounds amazing. Took about 4 hours to install, but most of that time was spent taking old heavy exhaust off

Asha Vila
July 27th, 2024
Absolutely amazing. Second kit I’ve ordered from Tuner Depot, super simple install if you are mechanically inclined. Loads of power and switch between tunes on the fly.

Clive Finch
February 2nd, 2024