Seguler Tuner Harness Plug Kit for 2011-2023 6.6L GM Chevy Duramax LML L5P

FITMENT

• 2011–2023 6.6L Chevy Silverado & GMC Sierra Duramax LML & 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

• Exposed wiring harness connectors are an easy target for moisture and corrosion after disconnecting stock emissions sensors on LML & L5P Duramax trucks. Unprotected open terminals beneath the frame rail quickly collect water, mud, and road grime—risking permanent pin corrosion and expensive electrical short circuits in your factory harness.
• Guard your truck’s electronic infrastructure with this complete LML & L5P Weatherproof Sensor Plug Package. Engineered to fit every disconnected exhaust and engine sensor plug on LML & L5P platforms, these heavy-duty caps snap securely into place, creating a watertight seal that keeps your factory wiring clean, protected, and fully preserved in all driving conditions.

Key Features

• Combines high-temp automotive ABS with premium silicone internal seals for long service life.
• Defends against pressure washers, de-icing salt, and deep mud through heavy-duty internal silicone gaskets that block moisture.
• Mirrors the L5P’s exact terminal patterns with precision molding so each cap seats air-tight with no gaps.
• Clicks into the factory harness clips via OEM-style locking tabs that stay put over rough ground.

FAQ

Q: What happens if mud gets packed inside an unsealed factory harness plug before I install this kit?

A: You should spray the open plug with electrical contact cleaner and let it dry completely before snapping our caps on. Once cleaned and sealed with these caps, moisture and dirt will no longer enter the terminal housing.

Q: Will these caps hold up against direct engine heat and exhaust pipe proximity?

A: Yes. Every cap is molded from thermal-stabilized automotive ABS rated to withstand underbody heat without cracking, melting, or warping when installed near exhaust components.

Q: What is the primary difference between this Harness Plug Kit and a CAN-Bus Termination Plug?

A: This kit provides passive protective caps that physically seal open factory sockets against water and dirt. A CAN-Bus Termination Plug contains internal resistors or chips that actively close an electrical circuit to maintain ECM communication.

Q: Can I use these caps alongside active CAN-bus terminator plugs if my specific tuning setup requires them?

A: Absolutely. Active CAN-bus terminators plug into specific network junction ports, while this kit provides exact-fit protective caps for all remaining disconnected sensor harnesses along the exhaust and frame rails.