Vehicle Compatibility: headlights assembly compatible with 1999 2000 2001 2002 Chevy Silverado 1500/2500; 2001 2002 Chevy Silverado 1500HD, 2500HD, 3500; 2000 2001 2002 2003 2004 2005 2006 Chevy Suburban; and 2000-2006 Chevy Tahoe (does not fit 2000 Tahoe Z71 model). Not compatible with GMC Sierra. High beam bulb type: HB3/9005, low beam bulb type: HB4/9006. Bulbs are not included, please carefully verify your vehicle?s model and year before purchasing | Waterproof Design: Fully sealed with solid silicon & designed with one-way vents to prevent moisture from being trapped inside the housing, no corrosion or moisture worries in sorts of weather conditions | Brighter & Safer: Lights minimize obnoxious glare during the night; the sided micro-prism reflector makes the oncoming cars or passerby quickly notice you at night, ensuring your driving safety and others | Impact Resistance: The polycarbonate lens & tough housing are highly resistant to shock, vibration for any tough road | Easy to Install: No modification, no cutting, or no drilling needed. The headlight assembly looks and functions like the stock headlights; professional installation would be highly recommended