07-14 GMC Sierra HD X3B LED Third Brake Light

Morimoto X3B LED Third Brake Light X3B50 – GMC Sierra HD (2007–2014)

Upgrade your Sierra HD with the Morimoto X3B LED Third Brake Light X3B50, designed specifically for 2007–2014 GMC Sierra HD trucks. Combining modern LED styling, powerful brake light performance, and improved cargo bed illumination, the X3B replaces the traditional factory third brake light with a premium upgrade built for both style and functionality.

Featuring advanced 3D brake light optics, powerful 3W LEDs, and integrated white LED bed lighting, the Morimoto X3B gives your Sierra HD a more modern appearance while improving visibility and nighttime usability.

Vehicle Compatibility

Designed as a direct replacement for compatible:

• 2007 GMC Sierra 2500 HD
• 2008 GMC Sierra 2500 HD
• 2009 GMC Sierra 2500 HD
• 2010 GMC Sierra 2500 HD
• 2011 GMC Sierra 2500 HD
• 2012 GMC Sierra 2500 HD
• 2013 GMC Sierra 2500 HD
• 2014 GMC Sierra 2500 HD
• 2007–2014 GMC Sierra 3500 HD

Modern 3D LED Styling

The Morimoto X3B completely transforms the appearance of the factory third brake light with a modern 3D optical design that complements the rugged styling of the GMC Sierra HD.

The distinctive LED lighting signature provides a clean, contemporary appearance while delivering excellent visibility during both daytime and nighttime driving.

Quad LED Brake Light Optics

The X3B features four dedicated brake light optics constructed from high-quality optical-grade polycarbonate and powered by 3W LEDs.

These advanced optics produce bright, high-intensity brake light illumination, helping improve the visibility of your Sierra HD to drivers behind you.

Integrated Rail-Style LED Bed Lighting

The Morimoto X3B isn't just about appearance. Integrated rail-style white LED bed lights provide powerful and practical illumination for your Sierra HD's cargo area.

The LEDs are strategically positioned to distribute light evenly across the truck bed and help minimize dark spots, making it easier to load, unload, or locate tools, equipment, and cargo after dark.

Plug & Play Installation

Installation is designed to be simple and straightforward. The Morimoto X3B uses the existing factory mounting locations and connects directly to the stock wiring harness.

No cutting, splicing, or permanent electrical modifications are required, making the X3B a true plug-and-play lighting upgrade.

DOT & SAE Compliant

The Morimoto X3B Third Brake Light is engineered to meet applicable DOT and SAE requirements, combining modern aftermarket styling with properly designed automotive lighting performance.

Premium Construction

Built using high-quality polycarbonate optics, durable housing materials, and premium LED components, the Morimoto X3B is engineered for long-term reliability and dependable performance.

Morimoto backs the X3B with a five-year warranty, providing additional confidence in the quality and durability of your lighting upgrade.

Key Features

• SKU / Part Number: X3B50
• Designed for 2007–2014 GMC Sierra HD trucks
• Compatible with applicable Sierra 2500 HD and 3500 HD models
• Modern 3D LED lighting design
• Quad LED brake light optics
• Powerful 3W LEDs
• High-intensity brake light output
• Integrated white LED bed lighting
• Rail-style cargo light design
• Designed to minimize dark spots in the truck bed
• Optical-grade polycarbonate construction
• Uses factory mounting locations
• Connects directly to the stock wiring harness
• Plug-and-play installation
• No cutting or splicing required
• Designed to meet applicable DOT and SAE requirements
• Five-year warranty

Modernize your 2007–2014 GMC Sierra HD with the Morimoto X3B LED Third Brake Light X3B50 — combining advanced LED brake lighting, powerful cargo bed illumination, premium construction, and easy plug-and-play installation in one complete upgrade.

Technical Specifications

• Input: GM Multi-Pin OEM
• Brake Lights: 4x 3W Red LEDs
• Bed Lights: 3w White LEDs
• Housing: Piano Black Polycarbonate
• Lens: UV-Resistant Clear Polycarbonate

What's Included

• Third Brake Light: 1x Morimoto X3B Third Brake Light
• Wiring: 1x Plug and Play Adapter Harness
• Gasket: 1x Replacement Foam Gasket
• Optional Rapid Flash Module: Plug and Play Flasher (X3B01)
• Warranty: Five (5) Years

Compatibility

• Chevrolet Silverado 1500: 2007-2013
• Chevrolet Silverado HD: 2007-2014 (2500, 3500, HD Models)
• GMC Sierra 1500: 2007-2013 (1500, 1500HD Models)
• GMC Sierra HD: 2007-2014 (2500, 3500, HD Models)
• Hummer H3T: 2009-2010
• Replaces GM Part #: 25890530, 25834790
• Note: These lights were developed for compatibility with North American vehicles. Morimoto does not guarantee compatibility on vehicles outside of North America.

Installation Guide

Product Video