GM Duramax 6.6L - Shibby Engineering Tuner Harness Plug Kit (2011-2023)

Introduction

Protect exposed wiring after emissions modifications with the Duramax DPF Delete Plug Kit (2011–2023). Designed for GM/Chevy 6.6L LML, LGH, L5P and L5D engines, this kit seals unused exhaust and EGR connectors to block out moisture, dirt and debris. It provides a clean, factory-style finish for trucks running performance or off-road calibrations.

Available Manufacturers

Customers can now choose between Shibby Engineering’s plug kit and the newly added Black Bandit option. Black Bandit manufactures locally, allowing them to offer a more cost-effective price point while maintaining and in many cases exceeding the same premium build standards expected in the diesel performance market.

Key Features

• Weatherproof Protection – Factory style caps shield unused connectors from moisture, dirt and debris.
• OEM-Like Fit and Finish – Each plug locks securely into the harness, giving the engine bay a clean, professional appearance.
• Simple Installation – No special tools required; the caps snap into place quickly and easily.

Benefits

• Prevents Wiring Damage – Weather-sealed caps guard unused connectors from corrosion and environmental exposure.
• Clean, Factory-Style Appearance – Maintains a tidy, OEM-like look after removing emissions components.
• Performance-Focused Compatibility – Ideal for trucks equipped with DPF, EGR or exhaust modifications and off-road calibrations.

Compatibility

• 2011–2023 GM/Chevy 6.6L Duramax LML
• 2011–2023 GM/Chevy 6.6L Duramax LGH
• 2017–2023 GM/Chevy 6.6L Duramax L5P
• 2019–2023 GM/Chevy 6.6L Duramax L5D

Technical Specifications

• Design: Snap-in protective caps for unused DPF/EGR wiring connectors
• Construction: Weather-resistant polymer housings
• Function: Seals open harness ends created by exhaust or emissions-system modifications
• Fitment: Direct OEM-style engagement with no wiring modification required

Installation & Notes

• Installation Time: Under 30 minutes with basic hand tools
• Tool-free, snap-in design
• Designed for trucks with off-road or performance modifications

Additional Information

• Not Included:
  • DEF tank plugs
  • Shift-on-the-fly tuning caps
  (Sold separately)
• Best For: Owners needing clean, protected wiring after emissions-system removal or modification.

Frequently Asked Questions (FAQ)

Q1: Will this kit fit all 2011–2023 6.6L Duramax trucks?
A1: Yes. It fits LML, LGH, L5P and L5D-equipped models.

Q2: Are the Shibby Engineering and Black Bandit kits interchangeable?
A2: Yes. Both provide the same OEM-style connector interface with different pricing and manufacturing sources.

Q3: Do I need special tools?
A3: No. The caps snap into place by hand.

Q4: Are DEF or SOTF plugs included?
A4: No. These components are sold separately.

Q5: Is this kit intended for trucks with emissions modifications?
A5: Yes. It is specifically designed to protect unused connectors created by DPF, EGR or exhaust changes.