2pcs for GMC Yukon XL 2500 8.1L 2003-2006 Upstream Downstream O2 Oxygen Sensor

2pcs O2 Oxygen Sensor Upstream Downstream Fits 03-2006 Chevy Silverado 3500 8.1L

2pcs O2 Oxygen Sensor Upstream Downstream Fits 2001-2002 GMC Sierra 2500 HD 8.1L

2pcs Upstream & Downstream for 2003-2006 GMC Yukon XL 2500 8.1L O2 Oxygen Sensor

2pcs for GMC Sierra 2500 HD 3500 Upstream Downstream O2 Oxygen Sensor 2001-2002

2pcs Upstream Downstream O2 02 Oxygen Sensor for 03-2006 GMC Yukon XL 2500 8.1L

2pcs for GMC Sierra 2500 HD 3500 Upstream Downstream O2 Oxygen Sensor 2001-2002

For 01-02 GMC Sierra 2500 HD 8.1L Upstream Downstream O2 02 Oxygen Sensor 2pcs