Vehicle Fitment: Compatible with GMC 1999-2007 Sierra 1500/2500, 2001-2007 Sierra 1500 HD/2500 HD/3500, 1999-2006 Yukon, 2000-2006 Yukon XL 1500/2500, 2001 Sierra C3. Sealed Design: CNNELL Headlights are precise molding designed by our experienced engineers, it has fully-sealed structure and one-way vents, which prevent moisture and work well in any bad weather. Brighter and Safer: Clear lens and unique design make CNNELL Headlights have good transparency and light reflectivity, make lighting brighter and wider, improve driving safety for you and others. Excellent Material: Made of materials that meet or exceed OEM requirements. Attention: No Instruction Included. Strongly Recommend Professional Installer for Installation! If you have any doubts please let us know and we will answer it for you. Bulb Shape Code: 9005 High / 9006 Low Beam. Bulbs Included: No. Reuse Existing Bulbs. Lighting Technology: Halogen. Material: ABS Plastic / Polycarbonate Lens. Lamp Type: Halogen. Color Temperature: 6000K. LED Energy: 12V. Interchange Part Number: 15166756, 15166757, 125104011, 125103011. Fitment: Compatible with 1999-2007 GMC Sierra 1500. Compatible with 2001-2007 GMC Sierra 1500 HD. Compatible with 1999-2004 GMC Sierra 2500. Compatible with 2001-2007 GMC Sierra 2500 HD. Compatible with 2001-2007 GMC Sierra 3500. Compatible with 1999-2006 GMC Yukon. Compatible with 2000-2006 GMC Yukon XL 1500. Compatible with 2000-2006 GMC Yukon XL 2500. Compatible with 2001 GMC Sierra C3. Compatible with 2007 Classic Models ONLY. Includes: 1 X Pair of Headlights (Left & Right). 1 X Pair of Turn Signal Running Lights (Left & Right).