The NEW Genuine GM Diesel Emissions Reduction Fluid (DEF) Injector 12647372 is a direct replacement part for Silverado trucks, manufactured by GM Genuine Parts. This OEM part is specifically designed to reduce diesel emissions and comes with a genuine manufacturer part number for easy identification and installation. The item dimensions are 3.3 inches in height, 5 inches in length, and 4.8 inches in width, weighing only 0.7 lbs. It is a reliable and high-quality product that ensures a proper fit and effective emissions reduction for your vehicle. Shipping is free on this item. Thank you