Lochnchn GMC Sierra Replacement Tail Light for 2019-2025 Sierra 1500/2500HD/3500HD — Halogen Direct-Fit, Waterproof

Lochnchn tail light is a direct-fit halogen replacement for select 2019–2025 GMC Sierra 1500, 2500HD and 3500HD models, providing factory-style lighting with waterproof plastic construction.

Replace a damaged or worn taillight with this Lochnchn unit engineered to match the original mounting points and functions of factory halogen assemblies. It is designed to work with halogen-equipped Sierra trucks from model years 2019 through 2025 (including PRO, SLE, Elevation and 1500 Limited where specified), offering brake, reverse and running-light operation once the bulb is fitted. This assembly is not compatible with full LED tail light variants—confirm your truck’s tail light type before ordering.

Which GMC Sierra years and trims will this Lochnchn tail light fit?

This replacement is made to fit GMC Sierra 1500 (2019–2025 PRO/SLE/Elevation and 2022 1500 Limited) and GMC Sierra 2500HD/3500HD (2019–2025). It follows the original mounting layout for halogen models only. Always verify your vehicle’s year, trim and whether it uses halogen rather than full LED lights before purchasing.

• Fitment: 2019–2025 Sierra 1500 PRO, SLE, Elevation; 2022 Sierra 1500 Limited
• Also fits: 2019–2025 Sierra 2500HD and 3500HD
• Not compatible with full LED tail light assemblies
• Confirm factory halogen tail light type prior to installation

What lighting functions does the replacement provide?

Once you install the appropriate bulb, the Lochnchn assembly supports three primary functions: brake illumination, reverse light, and driving/running light. The unit is built to work with standard halogen bulbs and the truck’s existing wiring, giving predictable, OEM-style operation. This makes it suitable for routine driving and backup maneuvers when matched to correct bulbs.

• Brake light — bright, visible stop indication
• Reverse light — clear white illumination for backing up
• Driving/running light — low-intensity illumination during motion
• Works with factory halogen bulbs and wiring harness

How durable and weather-resistant is the Lochnchn taillight?

The housing is molded from robust plastic and sealed to resist dust and moisture, extending service life under normal road and weather conditions. Its construction balances weight and toughness while preserving the look and fit of the original equipment. Routine inspection of seals and connectors is recommended for long-term reliability.

• Material: impact-resistant plastic housing
• Sealed design: dustproof and waterproof protection
• High-brightness output for visibility and safety
• Designed for long service life under road use

Is installation difficult and do I need a mechanic?

Installation is straightforward for someone familiar with automotive light assemblies: the unit installs into the factory mounting points and connects to the existing harness. A competent DIYer can complete the swap with basic hand tools, but professional installation is recommended if you’re not comfortable working with vehicle electrical connections or interior trim removal.

• Direct-fit to factory mounting locations
• Plug-and-play with halogen wiring harness (no major modification)
• Basic tools typically required; professional install advised if unsure
• Check bulb fitment and functionality after installation

Who is this for: This Lochnchn taillight is intended for GMC Sierra owners who need an OEM-style halogen replacement for 2019–2025 1500 (select trims), 2500HD and 3500HD models. Choose this part if your original halogen taillight is cracked, fogged, leaking or otherwise failing, and you want a durable, weather-resistant assembly that restores brake, reverse and running-light functions. Not suitable for trucks equipped with factory full-LED tail lights.