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12_9493322e-f542-47c7-8597-1063d590fdcc - Northline Parts

LML CP3 Conversion Kit w/o Pump for Silverado Sierra 6.6L V8 Duramax 2011-2016

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I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

LML CP3 Conversion Kit w/o Pump for Silverado Sierra 6.6L V8 Duramax 2011-2016

Upgrade your fuel system with this high-quality aftermarket LML CP3 conversion kit. Designed specifically for 2011-2016 Silverado and Sierra 6.6L V8 Duramax engines, this kit provides a reliable solution for replacing the factory CP4 pump setup with the more robust CP3 style. Please note that this is a premium aftermarket component and the CP3 pump itself is not included, making it an ideal choice for those who already have a pump or wish to source one separately.

Key Features & Benefits

  • Enhanced Reliability: Helps eliminate the known failure points of the factory CP4 pump system.
  • Premium Aftermarket Quality: Engineered to meet or exceed industry standards for fitment and long-term performance.
  • Comprehensive Hardware: Includes the necessary lines, fittings, and brackets for a streamlined conversion process.
  • Cost-Effective Solution: A high-performance alternative to expensive OEM replacement parts.
  • Engine Longevity: Designed to provide a more stable fuel delivery system to protect your Duramax engine.

Compatible Models

  • 2011-2016 Chevrolet Silverado 2500HD 6.6L V8 Duramax LML
  • 2011-2016 Chevrolet Silverado 3500HD 6.6L V8 Duramax LML
  • 2011-2016 GMC Sierra 2500HD 6.6L V8 Duramax LML
  • 2011-2016 GMC Sierra 3500HD 6.6L V8 Duramax LML

Product Specifications

  • Part Type: CP3 Conversion Kit (Pump Not Included)
  • Compatibility: 6.6L LML Duramax Diesel Engines
  • Condition: Brand New Aftermarket
  • Material: High-grade steel and durable components

Frequently Asked Questions

Is this an OEM part?
No, this is a premium aftermarket part designed to provide high-quality performance and fitment as a replacement for original equipment.

How do I confirm compatibility?
To ensure this kit fits your vehicle, please verify that your truck is a 2011-2016 model equipped with the 6.6L LML Duramax engine. We recommend checking your vehicle's VIN or consulting with a professional technician before purchase.


Important: This is a premium aftermarket part and is not manufactured by the original equipment manufacturer (OEM). Brand names and model numbers are used for reference purposes only. Compatibility may vary depending on the machine's serial number. Please verify fitment before purchase.

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Service was professional and easy to work with. They kept me updated on my order and recommended a different part when the one I originally picked wasn’t going to work. Everything showed up as expected and the process was smooth overall.

- Customer, Chris D.

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