Tuner Harness Plug Kits

What Is a Tuner Harness Plug Kit?

The Tuner Harness Plug Kit simulates factory sensor signals after EGR or DPF delete, allowing the ECU to operate normally without the removed emissions components.

It prevents check engine lights, fault codes, and limp mode by properly terminating unused sensor connections once emissions systems are deleted.

Why Your Modified Truck Needs a Tuner Harness Plug Kit

The Hidden Dangers: Why You Can't Just "Tape It Up"

Ignoring exposed connectors is costly. Electrical tape peels off, allowing water to wick into the copper wiring. This moisture travels up the harness directly to the ECM, causing catastrophic failure.

• Prevents Corrosion: Stops "green death" (copper corrosion) in its tracks.
• Engine Bay Dress Up: A Shibby plug kit transforms a messy harness into a showroom-ready engine bay.
• Seals Out Debris: Keeps mud and road grime out of your connector points.

Compatibility Guide: Find Your Perfect Tuner Harness Plug Kit

We stock kits for every major diesel platform.

• Ram Owners: From the 6.7 Cummins wiring harness protection to the Ecodiesel tuner harness plug kit, we have you covered.
• Chevy/GMC Owners: We carry specific LML and L5P Duramax options to match GM's complex wiring.
• Ford Owners: Ensure your tuner harness plug kit 6.7 Powerstroke matches your specific model year for a watertight seal.

Tuner Harness Plug Kits Installation: Quick, Easy, and Reversible

Installation is straightforward and takes under 30 minutes. You don't need to be a mechanic to install a Cummins/Ecodiesel/Duramax/Powerstroke engine harness plug set. These feature an Easy Snap-Fit Design that clicks right into place—no special tools required.

Plus, if you ever need to return to stock, the plugs remove easily, leaving your factory connectors pristine.

Why Choose EGR Performance?

When it comes to your truck, quality isn't negotiable. Here is why thousands of diesel enthusiasts choose EGR Performance over generic budget alternatives.

• Unmatched Quality Assurance: Unlike cheap knock-offs, our Shibby Engineering plug kits are crafted from high-heat-resistant, automotive-grade materials. We strictly test every diesel tuning harness Shibby plug kit to ensure it withstands the harsh thermal environment of a diesel engine bay.
• Authorized & Certified: We maintain close relationships with top manufacturers like Shibby Engineering. Every product we sell meets or exceeds industry standards, ensuring you get genuine parts that fit perfectly every time.
• Deep Industry Expertise: We aren't just box movers; we are experts. With years of experience in 6.7 Cummins/Ecodiesel, Duramax, and Powerstroke modifications, we understand the nuances of your plug-and-play tuner harness needs better than anyone.
• Proven Track Record: Don't just take our word for it. Our reputation is built on countless successful builds and positive customer feedback. When you buy from EGR Performance, you’re buying peace of mind.

Frequently Asked Questions

Will this plug kit fit my specific truck model and year?

Yes, tuner harness plug kits are vehicle-specific. We carry specialized kits for the Dodge Ram Cummins 6.7L (2009.5-2024), 3.0L EcoDiesel 2011-2025, Ford Powerstroke 6.7L (2011-2025), and GM Duramax 6.6L (LML 2011-2016 & L5P 2017-2023). Please check the product title to match your engine and year, or view our Tuner Harness Plug Kit – Supported Vehicles list for specific compatibility.

What exactly does a tuner harness plug kit protect against?

These tunner harness plug kits are critical for protecting your diesel tuning harness from moisture, road salt, dirt, and corrosion. Without them, water can seep into exposed connectors and travel to your ECM, leading to expensive electrical repairs.

What is included in a typical tuner harness plug kit?

A standard Shibby engineering plug kit includes labeled plastic connector caps that snap directly over your exposed factory harness connectors. Note that DEF tank plugs are often sold separately, so please verify the kit contents if you are doing a full delete.

Should I use dielectric grease with my harness plugs?

Absolutely. We highly recommend applying dielectric grease to your Cummins, Ecodiesel, Powerstroke, or Duramax terminals before snapping the plugs on. This creates a secondary barrier against moisture and ensures your connections stay corrosion-free forever.

Can I remove and reuse these plugs later?

Yes. The snap-fit design allows for damage-free removal. If you ever need to reverse your modifications, simply unclip the plugs—your factory connectors will be clean and ready for use.