Shibby GM Duramax Tuner Harness Plug Kit (2011–2016 GM Duramax LML LGH 6.6L)

Protective tuner harness plug kit for tuned or optimized GM Duramax trucks. Installs over exposed connectors to keep moisture, debris, and corrosion out of unused exhaust and select EGR harness circuits.

Overview

This base kit supplies weatherproof caps with factory‑style interfaces. It protects all the exhaust harness connectors and some EGR harness components on optimized 6.6L Duramax trucks. This is a protective solution, not a tuning device.

Key Details

• Weatherproof caps with factory‑style interfaces for clean, sealed connections
• Protects all exhaust harness connectors and select EGR harness components
• Designed for trucks that have been tuned or otherwise optimized
• Base kit — additional caps for DEF tank or SOTF setups sold separately

Compatibility

2011–2016 GM Duramax — LML and LGH engine codes — 6.6L

What’s Included

• Base kit of weatherproof harness caps with factory‑style interfaces covering exhaust and select EGR harness connectors

Notes

• Does NOT cover vehicles where the EGR is still fully installed and in use
• Does NOT cover DEF tank harness components
• Does NOT include SOTF tuning caps; those pieces are available separately in store

Why Choose Dieselr?

Clear fitment. Direct support. Parts selection aligned with professional installers and dealers. If you need additional caps or SOTF/DEF coverage, our team will point you to the exact pieces required.