4pcs Oxygen O2 02 Sensor for 99-02 GMC Sierra 1500 4.3L 4.8L Upstream Downstream

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Oxygen O2 02 Sensor for 2003-2005 GMC Yukon 4.8L 2Pcs Upstream + 2Pcs Downstream

Oxygen 02 O2 Sensor For 99-2002 GMC Sierra 1500 4.8L Upstream & Downstream Set 2

Set 4 Upstream Under O2 02 Oxygen Sensor For 2003-2005 GMC Sierra 1500 4.3L 4.8L

4pcs Upstream+Downstream for 2003-2005 GMC Yukon 4.8L Oxygen Sensor O2 02

2 set Oxygen Sensor For 99-02 GMC Sierra 1500 4.8L Upstream & Downstream

Oxygen O2 02 Sensor for 2003-2005 GMC Yukon 4.8L 2Pcs Upstream + 2Pcs Downstream