Engineered for the demanding 6.6L engine in your 2022 Chevrolet Silverado 2500 HD, this iridium spark plug delivers superior ignition performance and extended service life. Iridium's exceptional durability resists erosion and maintains precise spark gap consistency, ensuring reliable cold starts and optimal combustion efficiency across varying load conditions. Built to OEM specifications, it provides enhanced fuel economy and reduced emissions while withstanding the high-temperature environment of heavy-duty diesel operations. A direct replacement that restores factory-level performance and dependability.