2pcs Upstream & Downstream for 2001-02 GMC Sierra 2500 HD 8.1L O2 Oxygen Sensor

For 2001-02 GMC Yukon XL 2500 8.1L Oxygen O2 Sensor 02 Upstream+Downstream 2pcs

2pcs Upstream & Downstream for 2001-02 GMC Sierra 2500 HD 8.1L O2 Oxygen Sensor

2X for 01-2002 GMC Yukon XL 2500 8.1L Oxygen 02 o2 Sensor Upstream & Downstream

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

02 O2 Oxygen Sensor For 2003-2012 GMC Sierra 2500 HD 6.0L Upstream Downstream

2pcs Fits 03-06 GMC Sierra 2500 HD 8.1L O2 Oxygen Sensor Upstream & Downstream