2011-2016 6.6L GM Chevy Duramax LML Tuner Harness Plug Kit

Protect your truck's expensive factory wiring investment with this 2011-2016 6.6L GM Chevy Duramax LML Tuner Harness Plug Kit. Designed to seal vulnerable open plugs and prevent short circuits or corrosion after custom tuning.

Weatherproof Seal: Molded with high-grade automotive silicone/rubber seals to form an airtight barrier against high-pressure car washes, mud, and road salt.

Preserves Factory Wiring: Keeps factory harness pins clean, dry, and corrosion-free so that original connectors can plug right back in flawlessly if returned to stock.

OEM-Style Snap Locking: Designed to the exact dimensions of GM’s factory plugs, clicking securely into place so they will not vibrate loose under heavy towing or rough terrain.

Fits: 2011–2016 6.6L Chevy Silverado and GMC Sierra Duramax LML engines (Note: Base kit does not include DEF tank plugs or shift-on-the-fly plugs, which are available separately).