United States – EGR Performance, a trusted name in aftermarket diesel performance solutions, is proud to announce the Shibby Engineering Shibby Engineering Tuner Harness Plug Kit Replacement for the 2017–2023 GM 6.6L L5P Duramax.
Designed specifically to seal the exposed ECM harness port after the tuning harness is unplugged, this tuner harness plug prevents moisture, dirt, and debris from settling on sensitive pins: saving technicians the time and effort of cleaning contacts before reconnection.
The Challenge: Exposed Connectors Are a Common Vulnerability
Modern diesel trucks rely on sophisticated electrical systems, and exposed connectors are vulnerable whenever a tuning harness is removed. Common risks include:
Dust and dirt accumulating on bare pins, leading to poor contact
Moisture intrusion that can cause oxidation over time
Debris contamination that requires additional cleaning before reconnection
The new tuner harness plug from EGR Performance seals those connections instantly, preventing dust and moisture from accumulating on bare pins: reducing the need for contact cleaning before the harness is reinstalled.
Precision Fit for L5P Duramax 2017–2023
Specifically engineered for GM 6.6L L5P Duramax engines from 2017 to 2023, this plug kit is a practical modification for professional tuners, mechanics, and truck owners.
Key design features include:
Exact replication of the OEM L5P ECM harness connector contour
Pin-layout footprint matching for a secure, snap-fit seal
Stable retention even under under-hood vibration
Quick on-and-off installation without tools
Unlike generic rubber plugs, this tuner harness plug stays in place and provides consistent protection across multiple tuning sessions.
Where to Get It
The plug kit is available for immediate order directly through the EGR Performance online store.
International shipping is available. For pricing, fitment confirmation, and shipping options, visit:
https://www.egrperformance.com/products/tuner-harness-plug-kit-gm-6-6l-l5p-duramax-2017-2023
Built for Under-Hood Durability
The tuner harness plug is molded from UV-stable, heat-resistant engineering plastic, designed to withstand:
Under-hood temperature extremes
Engine vibration and movement
Exposure to oil mist and moisture
It installs and removes in seconds, making it a convenient addition to any L5P Duramax owner’s toolbox.
Who Benefits from This Tuner Harness Plug Kit
Whether used in a professional shop or a home garage, this tuner harness plug kit for L5P offers simple, effective protection.
It is especially useful for:
Professional diesel tuners who frequently unplug and reinstall harnesses
Shop technicians performing diagnostics or ECU flashing
Truck owners who store their vehicles for extended periods
Enthusiasts who perform their own maintenance and tuning
Dirt, water, and debris can settle on exposed connectors during maintenance or storage, and this kit keeps them clean: helping preserve connector condition and reduce cleaning time when the tuning harness is reattached.
Why Connector Protection Matters
As diesel powertrains become more electronically complex, keeping harness connectors clean during service has become a simple but worthwhile practice.
Benefits of using a dedicated L5P tuner harness plug kit:
Maintains connector pin integrity over time
Reduces the need for repeated pin cleaning between tuning sessions
Prevents corrosion-related contact resistance
Saves diagnostic time by eliminating contamination as a variable
Performance parts like this tuner harness plug for L5P helps maintain connector integrity and reduce unnecessary rework during routine tuning and maintenance.
About EGR Performance
EGR Performance is a leading provider of aftermarket diesel performance parts specializing in solutions that improve engine efficiency, reliability, and power. With a strong commitment to engineering quality and real-world performance, the company offers premium products designed for diesel truck owners across the United States and around the world.
Media ContactCompany Name: EGR PerformanceContact Person: Alex Reed, Media RelationsEmail: Send EmailCountry: United StatesWebsite: https://www.egrperformance.com
