AlphaRex PRO-Series Halogen Projector Black Headlights for K2XX GMC Sierra

The GMC Sierra is a proven platform that continues to attract enthusiasts looking for purposeful lighting upgrades. AlphaRex has developed dedicated 14-18 GMC Sierra headlights to complement the vehicle’s front-end character with high-performance halogen projector optics in a clean housing. The PRO-Series headlights for the 14-18 GMC Sierra are purpose-built to enhance both aesthetics and on-road visibility without compromising fit, function, or regulatory compliance.

Light Features

• The GMC Sierra headlights use a precision projector design powered by high-output LED technology for both low and high beam. A slim LED tube along the lower edge of the housing provides distinctive accent lighting. An integrated DRL provides enhanced daytime visibility. Amber sequential turn signals create a sweeping, dynamic indicator effect.

Breathing Vents

• Condensation is a common challenge in both OEM and aftermarket headlights, as moisture can accumulate inside housings due to temperature changes even with strong seals. To address this, Nitto Denko TEMISH® CAPSEAL™ air vents promote efficient moisture discharge in the GMC Sierra headlights. These vents improve airflow within the housing so moisture can escape naturally, functioning like a breathing mechanism, earning them the “Air Breathers” name.

Housing

• The headlights housing is constructed from high-quality polypropylene (PP) for lasting durability. Polypropylene’s strong resistance to heat and moisture helps maintain reliable performance across a wide range of driving conditions and climates.

Lens

• The GMC Sierra headlights use high-quality polycarbonate lenses engineered to withstand extreme weather conditions while delivering excellent lighting performance. An anti-fog coating reduces internal fogging and improves visibility in changing conditions. A protective UV-resistant coating is also applied to resist yellowing and oxidation, keeping the lenses clear and looking newer for longer.

Features

• LED tube accent
• Sequential turn signal
• Integrated DRL
• Projector optics
• Direct OEM fitment, no modifications required
• Plug-and-play installation

What’s Included

• One pair of AlphaRex PRO-Series headlights (driver and passenger side)
• Required mounting hardware
• Installation instructions

Applications

• GMC Sierra 1500: K2XX | 2014-2018
• GMC Sierra 2500HD: K2XX | 2015-2019
• GMC Sierra 3500HD: K2XX | 2015-2019

Frequently Asked Questions

What GMC Sierra models and years do the AlphaRex PRO-Series Black headlights fit? The AlphaRex PRO-Series Black headlights are built for three K2XX-generation GMC Sierra applications: the Sierra 1500 (2014-2018), the Sierra 2500HD (2015-2019), and the Sierra 3500HD (2015-2019). All three use direct OEM fitment with no cutting, drilling, or modifications required.

Do these AlphaRex PRO-Series headlights fit the GMC Sierra 2500HD and 3500HD, or only the 1500? They fit all three. The AlphaRex PRO-Series Black headlights for the K2XX platform cover the GMC Sierra 1500 (2014-2018), Sierra 2500HD (2015-2019), and Sierra 3500HD (2015-2019). Buyers with heavy-duty Sierra trims should confirm their model year falls within the listed range before purchasing.

Do the AlphaRex PRO-Series GMC Sierra headlights include an activation startup sequence? No. The AlphaRex PRO-Series Black headlights for the K2XX GMC Sierra do not include an activation startup sequence based on the product listing. The featured lighting functions for this application are the LED tube accent, sequential turn signals, integrated DRL, and projector optics.

How do the AlphaRex PRO-Series Sierra headlights handle moisture and condensation? The AlphaRex PRO-Series headlights for the 14-18 GMC Sierra use Nitto Denko TEMISH CAPSEAL air vents integrated into the housing. AlphaRex calls these “Air Breathers.” They promote airflow inside the housing so moisture can exit naturally rather than collect, addressing the condensation buildup that can occur in both OEM and aftermarket housings due to temperature changes.

What are the AlphaRex PRO-Series K2XX Sierra headlight housings and lenses made from? The housing is constructed from polypropylene (PP) for resistance to heat and moisture across a range of driving conditions and climates. The lenses are high-quality polycarbonate with an anti-fog coating and a UV-resistant coating to prevent yellowing and oxidation, maintaining lens clarity over time.

Are the AlphaRex PRO-Series GMC Sierra headlights a direct plug-and-play install? Yes. The AlphaRex PRO-Series headlights for the K2XX GMC Sierra are designed for plug-and-play installation, connecting to the factory wiring without modifications. Each pair includes required mounting hardware and installation instructions.

About AlphaRex

AlphaRex has emerged as a leader in the automotive lighting industry, driven by a relentless commitment to innovation and quality. Since its founding in June 2018, the company has grown from a small operation to an industry-renowned brand, overcoming challenges and seizing opportunities along the way. This dedication to technological advancement is matched by a steadfast commitment to regulatory compliance and industry standards, ensuring that every product not only meets but surpasses expectations.