Duramax Fuel Coolant Pump Relocation Kit: The Essential Upgrade for Your 2020-2026 GM 6.6L L5P
If you own a 2020-2026 GM 6.6L Duramax L5P and want to install a larger, more efficient oil filter, you absolutely need the Duramax Fuel Coolant Pump Relocation Kit. This kit is not optional—it is a mandatory companion part for the PPE Deep Engine Oil Filter (Part Number 114000750). Without it, the factory fuel coolant pump physically blocks the installation of the bigger filter, and even if you force the filter in place, the hoses will rub against the hot filter, causing poor fuel cooling and potentially vapor lock. The relocation kit solves this problem by moving the pump away from the oil filter housing, allowing for superior 5-micron filtration and more than double the filter media size. Spending the extra $40 on this kit saves you from headaches, poor fuel economy, and expensive repairs down the road.
Why You Need the Fuel Coolant Pump Relocation Kit
The factory design of the 2020-2026 Duramax L5P places the fuel coolant pump directly in front of the oil filter housing. When you try to upgrade to the larger PPE Deep Oil Filter (114000750), the pump gets in the way. The PPE relocation kit replaces the factory mounting bracket and moves the pump away from the filter, creating the necessary clearance. This is a simple but critical modification that enables the use of a much better oil filter.
The PPE Deep Oil Filter provides 5-micron filtration compared to the standard filter, and it boasts more than double the filter media size. This means your engine oil stays cleaner for longer, and the increased oil capacity adds an extra layer of protection for your Duramax, especially if you tow heavy loads or run a tuned engine.
What Happens If You Skip the Relocation Kit
Some owners try to install the larger filter without the relocation kit by simply moving the hoses out of the way. This is a bad idea. According to verified customer reviews, the fuel coolant hoses will rub against the oil filter. The oil filter gets very hot during normal operation—engine oil runs at 200°F or higher. When the fuel coolant hoses are pressed against the hot filter, the coolant cannot effectively cool the fuel returning from the fuel rail. This can lead to vapor lock, which causes poor fuel economy, rough running, and potential long-term damage to your fuel system.
One customer described it bluntly: "With the fuel coolant hoses pressed against the filter, the coolant can't effectively cool the fuel coming back off the fuel rail. That can cause vapor lock. The result is **** fuel economy." The relocation kit moves the hoses away from the filter and secures the pump using the existing retention screws, creating a clean, safe setup.
What's Included in the Kit
The PPE 114002700 Fuel Coolant Pump Relocation Kit comes with everything you need for a straightforward installation:
- Fabricated mounting bracket – Replaces the factory bracket and positions the pump correctly.
- Molded hoses – Pre-formed hoses that route the coolant properly without kinking or rubbing.
- Hose clamps – All necessary clamps to secure the connections.
- Installation guide – Step-by-step instructions to get the job done right.
The kit is designed for a direct fit on 2020-2026 GM 6.6L Duramax L5P engines, including Chevrolet Silverado 2500HD, 3500HD, and GMC Sierra 2500HD, 3500HD models. The parts are well-engineered, and the quality of the hoses and bracket is consistently praised in customer reviews.
Installation Tips
Most users report that the installation is straightforward and can be completed in under an hour with basic hand tools. However, there are a few things to watch out for:
Check your wiring harness length. Some customers have reported that the factory wiring harness for the fuel coolant pump is too short to reach the pump after relocation. In some cases, you may need to cut a retaining zip tie that is holding the harness in place to give it more slack. A few reviewers suggested that the kit should include a wiring harness extension, so if you find the harness is tight, be prepared to reroute it carefully.
Use a new bolt for the pump. One customer noted that the kit includes a new lock nut but not a new bolt for mounting the coolant pump to the bracket. In their case, the original bolt snapped off during removal. It is a good idea to have a replacement bolt ready before you start the job.
Disconnect the battery. Some users have reported check engine lights (specifically code U1345) after installation, possibly related to electrical issues during the wiring process. Disconnecting the batteries before working on the wiring harness can prevent this.
Customer Feedback: What Owners Are Saying
The kit has an average rating of 4.5 to 4.86 out of 5 stars across multiple retailers, with the vast majority of reviews being positive. Here is a summary of what real owners are saying:
- "A must have!" – Scott C.D. from the United States says the large PPE oil filter was easy to install, but the fuel coolant pump was definitely in the way. He recommends spending the extra $40 on the relocation kit.
- "Well thought out and complete." – Brandon L. appreciated that everything fit well and all necessary parts were included. He suggested adding a 3-inch extension for the wire harness would make it perfect.
- "Great product to move things out-of-the-way." – James M. from the United States says the kit is an excellent solution for installing the big oil filter.
- "Outstanding product, well engineered, great quality, easily installed." – Alan S. from the United States highly recommends the product.
The few negative reviews center on the wiring harness issue and, in one case, a coolant pump error code that appeared after 3,500 miles. The manufacturer recommends checking that the harness is properly routed and not under tension.
Compatibility: Which Vehicles Does It Fit?
The PPE Fuel Coolant Pump Relocation Kit is designed for the following vehicles with the 6.6L V8 Turbo Diesel Duramax L5P engine:
- 2020-2026 Chevrolet Silverado 2500HD
- 2020-2026 Chevrolet Silverado 3500HD
- 2020-2026 GMC Sierra 2500HD
- 2020-2026 GMC Sierra 3500HD
The kit part number is 114002700, and the GTIN is 840171219333. Note that the kit is specifically designed for use with the PPE Deep Oil Filter (114000750). It will not work with the factory oil filter or other aftermarket filter sizes.
A Note on Your Fuel System: Why Quality Matters
While you are upgrading your truck's oil filtration system, it is also a good time to think about the overall health of your fuel delivery system. The fuel coolant pump relocation kit helps keep your fuel at the right temperature, but the fuel pump itself is just as critical for reliable performance.
If you are experiencing issues like hard starting, loss of power, or poor fuel economy, your fuel pump may be the culprit. A high-quality fuel pump ensures consistent fuel pressure and flow, especially under the heavy loads that Duramax owners often face.
Upgrade Your Fuel System with KEMSO Fuel Pumps
When it comes to reliable, high-performance fuel pumps, KEMSO is a brand you can trust. KEMSO fuel pumps are designed as OEM replacement units, making installation straightforward for DIY mechanics. They are built with high-quality materials that resist corrosion and are compatible with both gasoline and E85 ethanol fuels. Each KEMSO pump comes with a lifetime warranty, giving you complete peace of mind—if it fails for any reason, KEMSO will replace it at no cost. Their USA-based technical support team is ready to help you with any questions during installation or troubleshooting.
Whether you need a fuel pump for your Duramax diesel truck, your daily driver, or your motorcycle, KEMSO offers a wide range of options. Visit their website to browse their full lineup and find the perfect pump for your vehicle:
Final Thoughts
The Duramax Fuel Coolant Pump Relocation Kit is a small investment that makes a big difference. For around $40, you get the ability to use a superior oil filter that provides better filtration and increased oil capacity. More importantly, you avoid the risk of vapor lock and poor fuel economy caused by routing the fuel coolant hoses improperly. The kit is well-engineered, easy to install, and backed by strong customer reviews. If you are upgrading your 2020-2026 Duramax L5P with the larger PPE oil filter, do not skip the relocation kit—it is the only way to do the job right.
For all your fuel pump needs, whether for your Duramax or any other vehicle, remember to check out KEMSO Fuel Pumps at https://www.kemsoracing.com/ for high-quality, lifetime-warrantied products that deliver reliable performance.