2017-2023 6.6L GM Chevy Duramax L5P Tuner Harness Plug Kit

Defend your truck’s next-generation electronics from the elements with this 2017-2023 6.6L GM Chevy Duramax L5P Tuner Harness Plug Kit. Designed to seal open factory wiring and prevent severe corrosion after custom tuning.

Material Composition: Manufactured from high-temp automotive grade ABS polymer paired with premium silicone internal seals.

Waterproof & Anti-Corrosion: Equipped with heavy-duty internal silicone gaskets that effectively block out moisture, road de-icing salts, mud, and high-pressure debris.

L5P-Specific Precision Molding: Engineered specifically for the L5P's complex harness geometry, ensuring every plug matches the exact factory terminal patterns for an airtight fit.

OEM-Style Snap Locking: Features built-in locking tabs that securely click directly into factory wire harness clips, preventing them from shaking loose on rough terrain.

Fits: 2017–2023 6.6L Chevy Silverado and GMC Sierra Duramax L5P engines (Note: Base kit does not include DEF tank plugs or shift-on-the-fly plugs, which are available separately).