Fits: 2001–2003, 2005–2006 Chevrolet Silverado 1500 HD 2001–2010 Chevrolet Silverado 2500 HD 2002–2006 Chevrolet Silverado 3500 2007 Chevrolet Silverado 2500 HD Classic 2007 Chevrolet Silverado 3500 Classic 2007 Chevrolet Silverado 1500 HD Classic 2007–2010 Chevrolet Silverado 3500 HD 2001–2003, 2005–2006 GMC Sierra 1500 HD 2001–2010 GMC Sierra 2500 HD 2002–2006 GMC Sierra 3500 2007 GMC Sierra 1500 HD Classic 2007 GMC Sierra 2500 HD Classic 2007 GMC Sierra 3500 Classic 2007–2010 GMC Sierra 3500 HD Belltech2550Steering Knuckles & SpindlesIn 1983, Belltech developed one of the industry's first revolutionary products to help jump start the Sport Truck craze, the Drop Spindle. By relocating the spindle pin (Note: Application, while improving handling and retaining factory ride quality. Belltech spindles maintain critical suspension geometry and eliminate excessive ball joint, shock and tire wear common to other methods of lowering. Each spindle is crafted from powdercoated, CNC machined, high strength ductile iron castings providing the structural integrity to meet and exceed all factory specifications & requirements.Belltech dropped front spindles are designed to improve handling and retain exceptional ride quality. These spindles maintain suspension geometry, eliminating the excessive ball joint, shock, and tire wear that is common with other forms of lowering.