Tired of the stock third brake light ruining the clean look of your upgraded Sierra? The Morimoto X3B LED 3rd Brake Light is the upgrade your truck deserves — combining sleek style, next-level performance, and reliable utility lighting all in one bolt-on package.
Purpose-built for 2014–2018 GMC Sierra models, this is more than just a brake light — it’s the final piece of a full LED transformation that delivers both safety and style.
Key Features:
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Designed for GMC Sierra 1500/2500/3500 (2014–2018)
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3D Red LED Optics – Quad High-Intensity Brake Illumination
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Integrated White Bed Lighting – Rail-Style Light Spread
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Gloss Black Polycarbonate Housing
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DOT & SAE Compliant – Street Legal
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Plug-and-Play Wiring – No Modifications Required
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Optional F1-Style Rapid Flash Module (SKU X3B01)
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Backed by Morimoto’s 5-Year Limited Warranty
Why Upgrade to the Morimoto X3B?
Modern Style Meets Factory Fit
The stock 3rd brake light is stuck in the past. The Morimoto X3B brings modern 3D red optics, bright white bed lighting, and a gloss black housing that perfectly complements aftermarket headlights and taillights. It fits like OEM — but looks like a show truck upgrade.
High-Intensity Brake Output
Four 3W red LED modules behind precision-molded polycarbonate optics deliver serious output — easily visible in daylight and in poor weather. Add the optional Rapid Flash Module to activate an F1-style flash effect for maximum attention when braking.
Functional Bed Lighting You’ll Use
Unlike weak factory bulbs, the X3B uses rail-style white LED bed lights to flood your entire cargo area with visibility. Whether you’re unloading at night or working on the go, this feature adds real utility.
Effortless Installation
The Morimoto X3B reuses all OEM mounting points and wiring, making installation a true plug-and-play experience. No drilling, no splicing, no errors — just bolt it up, plug it in, and go.
Tested & Certified
DOT and SAE compliant and tested for U.S.-spec trucks, the X3B meets or exceeds all lighting standards. It’s engineered for truck owners who demand reliability, safety, and style — and it’s backed by a 5-year warranty for total peace of mind.
Vehicle Compatibility:
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GMC Sierra 1500/2500/3500: 2014–2018
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Replaces GM Part #: 23509162, 20979071
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U.S.-Spec Vehicles Only
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Fits trucks without reverse camera in third brake light
Technical Specifications:
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Input: GM Multi-Pin OEM
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Brake Light Output: Red LED (3W)
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Bed Light Output: White LED (3W)
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Housing: Gloss Black Polycarbonate
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Lens: UV-Resistant Clear Polycarbonate
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Compliance: DOT / SAE Compliant
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Warranty: 5-Year Limited Warranty
What’s Included:
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(1) Morimoto X3B LED 3rd Brake Light – GMC Sierra (2014–2018)
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Plug-and-Play Wiring Harness
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Optional: Rapid Flash Module (SKU X3B01)
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Installation Instructions
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Morimoto 5-Year Warranty
Complete the Look and Light the Way
Whether you’re finishing off a full LED build or just replacing a faded stock unit, the Morimoto X3B LED 3rd Brake Light is a sleek and functional upgrade that sets your truck apart. It’s bold, bright, and built to perform.
OEM fit. High-output LEDs. A real upgrade where it counts.
