【FITMENT】 Headlights Assembly Compatible with 1999-2006 GMC SIERRA 1500/2500; 2001-2006 GMC SIERRA 1500 HD/2500 HD/3500; 2007 GMC SIERRA 1500/1500HD/2500HD/3500 CLASSIC; 2000-2006 GMC YUKON / GMC YUKON XL; Does NOT Fit All Denali Trims; For 2007, Fits Classic Models ONLY.High beam bulb type: 9005(NOT INCLUDED); Low beam bulb type: 9006(NOT INCLUDED). Signal light: 3157A(NOT INCLUDED); Side marker light: 194(NOT INCLUDED); DRL:4114(NOT INCLUDED). OEM Part Number: 15199561, 15850351, 15850352. Partslink Number: GM2502188, GM2503188. 【WATERPROOF】Fully sealed with solid silicone and designed with one-way vents to keep moisture from trapping inside the case, no need to worry about corrosion or moisture in all weather conditions 【IMPACT-RESISTANT & TOUGH】Constructed with durable polycarbonate lenses that provide excellent protection from road debris abuse and the impact of branches on the trail, the high-impact shell also better withstands the shock and vibration of off-road adventures 【BRIGHTER LIGHTING & SAFETY REFLECTOR】Metal parabolic reflectors provide more light output for wider, smoother beams. Side microprism reflectors let oncoming vehicles or passersby quickly notice you at night, keeping you and others safe while driving 【DIRECT REPLACEMENT】Plug-n-play installation. Direct Bolt-On OE Fitment or Replacement for the Stock Unit; Requires No Modification or Drilling. Installation instruction is not included. SOCKIR 4PCS Headlight Assembly Fit For 99-06 GMC Sierra 1500 2500 3500/00-06 GMC Yukon Headlight Assembly + Park/Signal Headlamp LH+RH (Black Housing with Clear Reflector)