GM Duramax 6.6L LML - CP3 Conversion Kit (2011-2016)
Type: Fuel pump | Fits: GM Duramax
Guaranteed Secure Checkout
- Secure checkout
- Ships across Canada & USA
- Expert parts support
- Privacy protected
Secure payment options, trusted performance parts, and support before you order.
Upgrade reliability and performance with a proven CP3 fuel system.
The Duramax LML CP3 Conversion Kit replaces the weak CP4 fuel pump on 2011–2016 Duramax 6.6L engines with the highly reliable CP3 pump. This upgrade not only improves performance but also enhances long-term reliability. Depending on whether you choose an OEM CP3 pump or an aftermarket recalibrated pump, tuning may be required.
Vehicle Compatibility
- 2011 Chevrolet Silverado/GMC Sierra 2500 & 3500 6.6L Duramax
- 2012 Chevrolet Silverado/GMC Sierra 2500 & 3500 6.6L Duramax
- 2013 Chevrolet Silverado/GMC Sierra 2500 & 3500 6.6L Duramax
- 2014 Chevrolet Silverado/GMC Sierra 2500 & 3500 6.6L Duramax
- 2015 Chevrolet Silverado/GMC Sierra 2500 & 3500 6.6L Duramax
- 2016 Chevrolet Silverado/GMC Sierra 2500 & 3500 6.6L Duramax
Specifications
| Component | Details |
|---|---|
| Pump Compatibility | OEM CP3 or aftermarket recalibrated CP3 (tuning may be required) |
| Filter Block | CNC-machined billet 6061 aluminum, anodized for durability |
| Hoses | High-strength silicone, pre-assembled, abrasion-resistant |
| Pressure Testing | Verified to withstand more than 2× recommended radiator cap pressure |
| Mounting System | Bracket bolts to factory holes for easy installation |
Kit Contents
- Coolant filter
- CNC-machined filter block
- Factory-fit mounting bracket
- High-strength silicone hoses
- Complete installation hardware
Key Features
- Eliminates CP4 fuel pump failure risk
- Improves overall reliability and performance
- Leak-proof connections with pre-assembled hoses
- Quick and simple installation using factory mounting points
- Long-lasting durability with billet aluminum construction
Benefits
- Reduces costly repair risks tied to CP4 failures
- Boosts engine efficiency and fuel system stability
- Provides peace of mind with a proven, dependable pump setup
- Built for durability in demanding off-road conditions
Installation
This kit is designed for a straightforward installation. The filter head bolts directly to the included bracket, which mounts into factory holes. Minimal modifications are required.
Important Notes:
Hurry Up! Only 5 items left in stock!
Copy link:
Share:
TARIFF NOTICE:
While we ship with all required USMCA/CUSMA paperwork, U.S. Customs or carriers may still apply duties or fees at delivery. For details, see U.S. Customs & Border Protection
Shipping
We strive to provide fast and reliable shipping options for all our customers. For detailed information about our shipping rates, delivery times, and policies, please visit our Shipping Page.
Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
