The components in this engine valve cover bolt kit are designed to match the fit and function of the original equipment components on specified vehicles. The kit is engineered to help secure the engine valve cover to the cylinder head when the original hardware is missing, corroded, or damaged. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet C4500 Kodiak: 2003, 2004] - [Chevrolet C5500 Kodiak: 2003, 2004] - [Chevrolet Silverado 2500 HD: 2001, 2002, 2003, 2004] - [Chevrolet Silverado 3500: 2001, 2002, 2003, 2004] - [GMC C4500 Topkick: 2003, 2004] - [GMC C5500 Topkick: 2003, 2004] - [GMC Sierra 2500 HD: 2001, 2002, 2003, 2004] - [GMC Sierra 3500: 2001, 2002, 2003, 2004]