This set of 8 platinum spark plugs with part number 41-962 and 19299585 is perfect for GMC Sierra and Chevy Silverado vehicles. Made by ACDelco, these spark plugs are factory/OEM and are a direct replacement for the original parts. The part numbers superseded by this set include 41-962, 41962, and 19299585. These spark plugs are ready to use straight out of the box.