Nilight LED Third Brake Light for Chevrolet/GMC Silverado Sierra 2014-2018 — 27-LED, Plug-and-Play Waterproof

Nilight's LED third brake light is a direct-fit, high-output replacement for 2014–2018 Chevrolet Silverado and GMC Sierra models with cargo lights, combining brighter stop signaling and durable weatherproofing.

This third brake light swaps straight into compatible Chevy and GMC trucks that came from the factory with a cargo light — no cutting or custom wiring required. Built with 27 high-efficiency LEDs and an OEM-quality housing, it is engineered to deliver faster, clearer illumination than the halogen original while resisting moisture and road conditions. The unit ships with a high-density foam gasket for a tight seal and is designed for plug-and-play installation using the vehicle’s factory screws.

Will this Nilight light fit my Silverado or Sierra?

Yes — the lens and mounting pattern are made for Chevy Silverado and GMC Sierra 1500, 2500HD, and 3500HD trucks from model years 2014 through 2018 that originally include cargo lights. It is not intended for trucks without the cargo light cutout or for other vehicle lines.

• Vehicle compatibility: Chevy Silverado & GMC Sierra 1500 / 2500HD / 3500HD, 2014–2018
• Fits only models with factory cargo light locations
• Uses factory screw holes and original wiring harness

How bright and reliable is the LED assembly?

The fixture houses 27 LEDs—nine dedicated to brake signaling and 18 for cargo/clearance illumination—producing a brighter, faster-reacting light than typical halogen modules. LEDs offer higher efficiency and longer service life, so the assembly maintains consistent performance under frequent use.

• 27 total LEDs: 9 brake, 18 cargo/clearance
• Faster illumination response compared to halogen bulbs
• High-efficiency LEDs for extended operating life

Is the light waterproof and suited for harsh weather?

The housing includes a high-density foam backer and precision sealing to block water and road spray; the product is rated to resist moisture under normal driving conditions. For best long-term protection, apply a butyl sealant around the installed assembly as an extra preventative step against leaks.

• Sealed housing with foam-backed gasket to limit water intrusion
• IP67-level resistance for rain, snow, and roadside exposure
• Recommendation: use butyl sealant after installation for added waterproofing

How difficult is installation and what’s included?

Installation is designed to be plug-and-play and requires no drilling or wire splicing: disconnect the factory light, plug in the Nilight unit, and secure it with the original screws. The package contains the LED third brake light and a high-density foam pad; use hand tools to avoid over-tightening and potential cracking of the plastic housing.

• Plug-and-play connection with factory harness
• Use original screws; electronic drivers discouraged to prevent overtightening
• Package contents: 1 LED third brake light, 1 foam pad

Who this is for: This LED third brake light is ideal for Silverado and Sierra owners (2014–2018) who want a brighter, longer-lasting stop and cargo light replacement that installs quickly and improves rear visibility. It suits drivers who prefer OEM-style fitment and weatherproofing, and those willing to follow the simple butyl-seal step for optimal long-term waterproofing.