2011-2023 Duramax Wiring Harness Plug Kit (LML / L5P)

Duramax Wiring Harness Plug Kit

Complete set of sealed dummy plugs designed to cap and protect the factory wiring connectors left open after removing emissions components. When you delete your EGR, DEF, NOx, or EGT systems, those harness connectors are left exposed - this kit seals them up properly.

What You Get

• Complete vehicle set of OEM-style weather-pack sealed plugs
• Automotive-grade nylon construction with silicone moisture seals
• Covers EGR, DEF, NOx, and EGT sensor connectors
• Prevents short circuits, terminal corrosion, and moisture intrusion

Why You Need These

When you remove emissions components, the wiring harness connectors that plugged into them are left hanging open. Exposed terminals collect moisture, road grime, and corrosion - which can cause short circuits, check engine lights, and even damage your ECM. These sealed dummy plugs cap off those connectors cleanly, protecting your electrical system.

Fitment

• Option 1: 2011-2016 GM 6.6L Duramax LML
• Option 2: 2017-2023 GM 6.6L Duramax L5P
• Trucks: Chevy Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD

Need Help?

Not sure which kit fits your truck? Text us at (512) 522-9403 or email slabindustriesdiesel@gmail.com.