Description: Spark plugs are crucial components in internal combustion engines that generate the spark needed for ignition. It consists of a metal shell, insulator, and electrode. Compatibility may vary based on engine type and application. Refer to the manufacturer's documentation or vehicle manual for specific details. ACDelco. Vendor #41-985. 6.0L. 5.3L. 6.2L without supercharger. Iridium. 6.0 & 6.2L.