• Shibby Engineering tuner harness plug kit for GM Chevy Duramax diesel engines 2011-2023.
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Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

$169.00
$169.00
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FITMENT

Please choose the correct variant before placing your order.

This harness plug kit is compatible with:

  • Years: 2011–2023
  • Models: Chevy Silverado and GMC Sierra Duramax pickups
  • Engine: 6.6L Duramax LML (2011–2016) and L5P (2017–2023)

IMPORTANT INSTALLATION INFORMATION

We don’t have installation instructions for these harness plugs yet, but installing them is quick and straightforward. Our team is working on more detailed instructions.

The plugs cap off all the required sensors along the DPF/CAT and exhaust system after your delete, protecting them from the elements.

The Tuner Harness Plug Kit for 2011–2023 GM LML and L5P Duramax trucks caps off your exposed OEM EGR and DPF (Diesel Particulate Filter) harness connectors after a delete — keeping moisture, dirt, and debris out of the connectors now sitting unused under your hood and beneath your truck.

When you pull the EGR (Exhaust Gas Recirculation) and DPF systems, the factory wiring connectors that fed them don't go anywhere. They dangle there, exposed to heat, water, and road grime, and over time unprotected connectors corrode. That corrosion can spread to nearby wiring and throw phantom codes that are a pain to diagnose. This kit seals all of it off before that starts.

It provides the harness caps to keep water and debris out of the harness both under the hood and under the body of the truck. Each cap plugs directly into the OEM connector with no modification — easy to install, no tools, no guesswork — and leaves your engine bay with a clean, finished look. Shipping is included in the price.

Fitment is for 2011–2016 LML and 2017–2023 L5P Duramax pickup models only. It does not fit Cab & Chassis trucks, and it won't fit LMM, LBZ, LLY, or LB7 Duramax generations — the connector profiles are specific to the LML and L5P. Need help figuring out which connector is which? Call (888) 830-2588 or email sales@thedieseldudes.com.

For off-road/competition use only.

  • 5 stars: 36 (97%)
  • 4 stars: 1 (3%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
C
Christian Flores

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

M
Marcusnash
Best diesel guys

Great quality and really finished things up neatly. Don’t have to worry about moisture or corrosion. You guys are the best.

S
Scott Powell

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

D
Dan Earp
Good now

Just installed and so far I need some more miles on it. I could tell you that I am happy for sure. First thing other then it increased my fuel mileage.

M
Marvin Cannon
Easy to install

Just find the right one and plug it in

D
Drew Marquis
Harness plug kit

Everything worked as intended, deisel dudes products are worth every penny!

S
Steven Wagner
Great Kit

I got the full delete with the downpipe and 5" exhaust. The videos for the install made the job a lot easier and was able to do all work myself. I would definitely recommend this to everyone and love the tone and power that I got from it

E
Erik

This was great. It keeps the connections clean and free from dirt etc. Definitely a great idea if you ever plan or need to reinstall the stock stuff.

L
Len Worski
2020 silverado

So far so great! Ridiculously better than new. Still working on which level for the economy but all in all as expected we're both breathing easier. Vids were a bit miss leading( shortened apps) as was the hoses supplied but again great results. Needed more credits to complete. Somethings else to bring to your attention. But happy toy. Thanx

A
Ashley Greer

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

D
DJ Boyd
16 DURAMAX EGR DELETE AND TUNE

VERY SATISFIED ONCE I GOT OUT OF MY OWN WAY THE KIT WAS VERY SIMPLE AND EASY TO INSTALL.ONLY PROBLEMS I HAD WAS SELF INFLICTED WILL BE DOING FUTURE BUSINESS WITH DIESEL DUDES

A
Allan Flaumitsch

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

J
James Walters
Plugs

If you’re looking for a clean look and tuck the wires harnesses way without anything getting into the plugs it’s worth every penny everyone works

D
David Mach
Duramax

Absolutely love it

J
Jeff McNeley

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

B
Brady Feinauer

As expected

j
jason dow
17 Chevy duramax

your kit was very well thought out. Installation with the help of your videos and person to person instructions was great. My truck runs great and the power is amazing. I should have done this years ago. Thank you and I highly recommend your product

R
Robert Lewis

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

D
David R Downs
Everything was easy and straightforward

Everything was easy and straightforward. Can’t believe how much better this thing runs.

C
Christie Hunt
WOW!!

Instant power gain, instant fuel economy increase! Mine's a 22 GMC 3500 HD with the updated fuel system, hauling about 12k lbs, I'm getting about a 3 mpg increase at 75 mph. No load, upwards of 6! I leave it in the stock tune (#1). Breifly tried 2, 3, and 4. Still haven't got around to 5 yet, haven't found a need to, 4 is PLENTY!!!!! In stock tune it pulls better, and rolls coal under heavy throttle!! I got full kit with muffler.

E
Ernie Baldwin
Plug kit

Great option If you’re wanting to keep the option of reinstalling either one of the emission systems . Keeping plugs and wiring in good shape will certainly help with that process

D
David Rancour
Perfect

They have the perfect and easy setup

M
Mary Kane

Self explained great products

B
Ben Lockert
Great product

Was simple yo use and easy to install. Highly recommend these kits

J
James Fuller
Gm harness plug kit

Thankful I ordered this kit my harness is sealed and preserved for future it was worth the expense in my book I am 100% happy customer

J
Jay Bradford

Great product

R
Ross Whetten
Everything fits perfect

Excellent product

P
Phil Farnsworth

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

J
James Nichols
Plug Kit

Worked Great!

D
David Hughes
LML

Have not installed product. Shipping was fantastic. Customer service has been exceptional! More to follow

E
Ed Lowe
Nice kit

Nice kit but a little pricey

D
Don W
Tuner kit

Received delete kit within a couple of days . Very easy to install with the provided video instructions .All my questions were answered the same day I asked them .the tuner kit worked better than expected..Wished I would’ve installed sooner,Thanks

W
Walter Pridgen

Tuner Harness Plug Kit | GM/Chevy 2011-2023 | Shibby Engineering

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