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

This Shibby Engineering Plug Kit is built for 2011–2023 GM and Chevy 6.6L Duramax trucks (LML, LGH, L5P, and L5D models). It provides a reliable, weather-resistant solution for sealing unused harness connectors after performance upgrades.

Designed For Modified Setups

Whether you've upgraded your exhaust or EGR-related components, this kit helps maintain a clean, professional engine bay while shielding vulnerable connectors from the elements.

Key Features

• Weatherproof Protection: Factory-style caps block moisture, dirt, and debris to prevent corrosion and damage to exposed wiring.

• OEM-Style Fitment: Each plug integrates smoothly into your existing harness, maintaining a stock-like appearance.

• Quick, Tool-Free Install: Installs in under 30 minutes with no special tools required—perfect for DIY or shop installs.

Why Use This Kit?

• Preserve Wiring Integrity: Extends the life of unused connectors left exposed after modifications.

• Clean Engine Bay: Maintains a tidy, professional look post-upgrade.

• Performance-Ready: Ideal for trucks tuned or configured for off-road use or advanced performance setups.

Compatibility

• Models: 2011–2023 GM/Chevy 6.6L Duramax – LML, LGH, L5P, L5D

• Install Time: ~30 minutes with standard tools

Additional Notes

• Not Included: DEF tank caps and shift-on-the-fly (SOTF) tuning plugs are sold separately.

• Recommended For: Trucks running aftermarket tuning or hardware upgrades where factory plugs are no longer needed.