FITMENT
- 2017–2023 6.6L Chevy Silverado & GMC Sierra Duramax L5P engines;
- Note: The base kit does not include DEF tank plugs, Does not include shift on the fly plugs (Available Separately).
DESCRIPTION
Product Overview
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Defend your truck’s next-generation electronics from the elements. When configuring your 17–23 Duramax L5P with custom tuning, several factory emission and exhaust sensors are disconnected, leaving fragile open terminals vulnerable to catastrophic corrosion.
- The L5P Tuner Harness Plug Kit delivers a complete set of precision-molded weatherproof caps. Specially designed for the L5P's complex harness geometry, these plugs seal out water, mud, salt, and grime to keep your factory wiring safe and dry.
Key Features
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Material Composition: High-temp automotive grade ABS & premium silicone internal seals.
- Waterproof & Anti-Corrosion: Armed with heavy-duty internal silicone gaskets that block out high-pressure car washes, road de-icing salts, and deep mud pits.
- L5P-Specific Precision Molding: Unlike generic kits, every plug is engineered to mirror the exact terminal patterns of the factory harness for an airtight fit.
- OEM-Style Snap Locking: Built-in locking tabs securely click directly into the factory wire harness clips, ensuring they won’t shake or vibrate loose on rough terrain.
FAQ
Q: Does this kit fit the newer 2024+ refreshed Duramax L5P?
A: No, this kit is strictly for 2017–2023 model years. GM updated the ECM architecture and wiring harness configurations for the 2024+ refreshed trucks.
Q: Do these plugs contain resistors to turn off dashboard trouble codes?
A: No, these are passive protective caps. They contain no electronics or resistors. To prevent Check Engine Lights or limp modes, your truck must be running a custom multi-map or delete tune flashed into the ECM.
Q: Why does the L5P kit look different from the older LMM or LML kits?
A: GM completely redesigned the Duramax wiring harness for 2017+, adopting new sensor layouts and plug geometries. This kit features exclusive, precision-molded connector shapes that match the updated L5P terminals, which older kits cannot fit.
Q: Can I accidentally force a plug into the wrong factory connector?
A: No, thanks to the built-in OEM-style "keyway" design. Each plug features unique alignment slots that act as a mechanical lock, meaning they will only slide into and click with their exact factory counterpart, making a mistaken installation virtually impossible.
