The TYC 20-5567-00-1 Passenger Side Replacement Headlight Assembly is engineered to provide a direct, hassle-free replacement for the original equipment on 1999-2006 GMC Sierra 1500 models. This headlight assembly is designed to meet or exceed DOT/SAE standards, ensuring compliance with FMVSS 108 regulations for photometry and safety. Manufactured with precision, it features a chrome housing and clear lens, housing halogen bulbs for both low and high beams. The assembly includes a low beam bulb (9004/HB1) and a high beam bulb (9005/HB3), facilitating straightforward installation without the need for vehicle modifications. The lens is treated with a special coating to prevent hazing and fading, maintaining optimal illumination over time. Backed by a limited lifetime warranty, this headlight assembly offers a reliable and cost-effective solution for fleet operators seeking to maintain vehicle safety and performance.