Upper Oxygen Sensor – GM (12742976)

Part 12742976 is the GM Genuine Parts Upper Oxygen Sensor for the factory location it serves. It reports exhaust oxygen content so the ECM can hold its fuel trim. Catalogue application notes: 6.6L gas. Confirm the number on the part you are removing matches 12742976 before ordering; superseded numbers are the same component under a later release. GM Genuine Parts are the components installed during production or validated by General Motors for GM vehicles. Stocked in the US and dispatched within one business day.