Shibby Plug Kit for the 6.7 Cummins: What It Caps and What Fits

What Does a Tuner Harness Plug Kit Do After a Delete?

The Tuner Harness Plug Kit caps off the exposed OEM EGR and DPF harness connectors left behind after a delete.^[1] After a delete, the wiring that ran your EGR valve, DPF pressure sensors, and related components is still there, just no longer connected to anything.^[1] Open connectors corrode.^[1]

What is left on the truck once the EGR and DPF hardware come off

Pulling the hardware feels like the finish line. Here's the thing — it isn't. Once you've removed your Exhaust Gas Recirculation (EGR) hardware and DPF system, those connectors sit open under your hood and beneath the truck, and open connectors corrode.^[1]

It's a bit like pulling out an old sink and leaving the pipe stubs sticking out of the wall. The sink is gone. The stubs are still your problem.

Why a dead connector still needs attention

A connector with nothing plugged into it is easy to ignore. You're not using it, so why worry about it? Because nothing about a delete makes that connector any less open.

We get it — after a full delete, the last thing you want to hear about is one more part. Still, that open stub is part of the job. Let's break it down.

Why Do Open EGR and DPF Connectors Cause Trouble?

The open connectors sit under the hood and beneath the truck.^[1] Rain, steam and mud will find the exposed wiring.^[1] Corroded connectors throw intermittent fault codes that are miserable to chase down.^[1] The corrosion can spread to adjacent wiring.^[1] The harness caps in this kit keep water and debris out of the vehicle harness.^[1]

What gets into an open connector

Picture hosing the mud off your rig after a weekend on the trail, with every one of those open stubs sitting right in the spray. Not a pretty picture, is it?

Now count how many wash-downs and creek crossings your truck sees in a season. That number adds up fast.

Intermittent codes and why they are hard to chase

Intermittent is the word that should worry you. Nobody wants to spend a Saturday between events chasing a code that refuses to show up when you go looking for it. Miserable is the right word for it.

How far corrosion travels

One crusty connector is annoying. Corrosion that creeps into the wiring around it is a bigger headache. That's the real reason to cap them now rather than later.

Think of it like rust on a trailer frame. You deal with the first spot, or you end up dealing with the whole rail.

Which 6.7 Cummins Trucks Does the Plug Kit Fit?

The Tuner Harness Plug Kit fits 2013-2024 6.7 Cummins models only, specifically the Ram 2500 and 3500. It does not fit 5.9L Cummins or non-Cummins applications.^[1] The 6.7-liter Cummins turbo-diesel engine replaced the earlier 5.9-liter engine.^[2] Check the engine and the model year on your own truck before anything else.

Running an earlier 6.7? Slow down here. The kit fits 2013-2024 models only, so a 2007-2012 Ram with the 6.7 Cummins is not covered.^[1] Which row is your truck in? Find it before anything else goes on the bench.

Reading the engine and model year off your own truck

Don't go by memory, and don't go by what the last owner told you. Pop the hood, confirm the engine, then match the model year to a row in the table.

It's easy to figure a Cummins is a Cummins. That's exactly the assumption the table is there to stop.

Where the fit list stops

Why does the 5.9L get a row of its own? The two Cummins engines share a name, and a shared name is all it takes for the wrong part to land on your bench.

Same goes for anything without a Cummins under the hood. If your truck isn't in a yes row, stop and ask before going any further.

What Comes in the Plug Kit?

Here's what you get in the Tuner Harness Plug Kit. This kit provides the harness caps to keep water and debris out of the vehicle harness under the hood and under the body of the truck.^[1] The caps cover the EGR and DPF harness connectors.^[1] The caps leave a clean, finished look where your delete left open stubs.^[1]

Under the hood

Function comes first. The finish counts too. Sealed connectors can't collect moisture, which stops corrosion before it starts and keeps phantom fault codes quiet, and your deleted truck simply looks better without open stubs hanging under the hood.^[1]

If you've ever popped the hood in the pits or at a show-and-shine and winced at the loose ends, you know exactly what that's worth. Nobody admires a dangling stub.

Under the body of the truck

The other half of the job lives underneath. That's the side that eats the mud on the trail, so it's not the half to skip.

Want an exact cap count before the box shows up? Give the shop a call. The number is in the install section below, and a straight answer beats a guess every time.

Do You Need DEF Plugs as Well?

Settle this one before the Tuner Harness Plug Kit goes on the truck. This kit does not include DEF (Diesel Exhaust Fluid) connector plugs.^[1] The caps it does include cover the EGR and DPF harness connectors.^[1] If your application needs DEF plugs, contact the shop before ordering.^[1]

What the kit leaves out

Better to find that out now than halfway through the job, with the truck up on stands and a connector you weren't planning for. Nobody likes that kind of surprise.

What to do if your truck needs DEF plugs

Keep it simple and ask first. Have your model year and engine handy when you reach out, and the conversation gets a lot shorter.

How Do the Caps Go On?

Each cap plugs directly into its OEM connector location.^[1] Those connectors sit open under your hood and beneath the truck.^[1] Fit the Tuner Harness Plug Kit one connector at a time. If you're not sure which connector is which after your delete, call (888) 830-2588 or email sales@thedieseldudes.com.^[1]

Finding the open connectors

Start up top, then slide under the truck for the rest. Work the same order every time and nothing gets left open. A little patience here saves you crawling back under later.

When you cannot tell one connector from another

After a delete, the engine bay can look like a junk drawer full of loose ends. Don't force a cap onto a connector it wasn't made for. That's exactly what the phone line above is for.

Should You Order the Plug Kit for Your Truck?

It comes down to price and fit. The Tuner Harness Plug Kit is priced from $169.00 to $219.00. Shipping is included in the price.^[1] The kit fits only 2013-2024 Ram 2500 and 3500 trucks with the 6.7 Cummins. The kit does not fit 5.9L Cummins or non-Cummins applications.^[1]

Order it if your truck matches the fit list

For a deleted 2013-2024 Ram 2500 or 3500 with the 6.7 Cummins, this is the kit we'd put on it. It's not the flashiest part of a delete. It's the one that finishes it, and as finishing touches go, that's real bang for your buck.

Call first if you need DEF plugs or are unsure of your engine

If you need DEF plugs, contact the shop before ordering.^[1] Same goes if you're not certain what's under your hood or which model year you're working with. A quick call beats sending a box back.