FITMENT
- 2011–2016 6.6L Chevy Silverado & GMC Sierra Duramax LML 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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Protect your truck's expensive factory wiring investment. When upgrading your 2011–2016 GM Duramax 6.6L LML with custom tuning and off-road race configurations, several factory exhaust and engine sensors are disconnected, leaving vulnerable open plugs exposed to the elements.
- The Tuner Harness Plug Kit provides a complete set of heavy-duty, weather-proof block-off plugs. They snap directly into your disconnected factory connectors, completely sealing out water, mud, salt, and debris to prevent short circuits and corrosion.
Key Features
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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. If you ever need to return the truck back to its stock configuration, the original connectors will plug right back in flawlessly.
- OEM-Style Snap Locking: Designed to the exact dimensions of GM’s factory plugs. They click securely into place and will not vibrate loose under heavy towing or rough terrain.
FAQ
Q: Does this kit block off the exhaust pipes or the wiring harness?
A: Electrical Protection Only: This kit strictly caps off the open plastic electrical connectors hanging under the chassis and in the engine bay after sensors are removed. It does not block mechanical exhaust piping or EGR metal ports.
Q: Are these plugs affected by the high heat underneath the truck?
A: No, they are built for extreme automotive heat. Molded from high-impact, heat-stabilized composite with premium silicone gaskets, these plugs easily withstand the harsh ambient temperatures radiated by aftermarket exhaust pipes and engine components.
Q: What specific plugs are included in this kit, and which locations do they protect?
A: This kit completely seals the 4 major disconnected areas on your LML Duramax: It includes EGT plugs for the 4 frame rail sensors, NOx plugs for the chassis modules, DEF plugs for the main tank harness, and EGR/9th injector plugs for the open connectors under the hood.
Q: Are these plugs labeled for easy installation?
A: They are shaped to only fit their matching factory connectors.You don't need labels because each plug is keyed differently. If a plug doesn't effortlessly snap into a specific factory socket, it belongs to a different connector in the kit.
