2pcs Upstream Downstream O2 02 Oxygen Sensor for 2003-2005 Chevrolet Blazer 4.3L

O2 Oxygen 02 Sensor for 96-02 Chevy Express 1500 4.3L 2pcs Upstream + Downstream

2pcs Upstream & Downstream Fits for 03-2004 GMC Sonoma 4.3L O2 02 Oxygen Sensor

O2 Oxygen 02 Sensor for 96-02 Chevy Express 1500 4.3L 2pcs Upstream + Downstream

O2 Oxygen 02 Sensor for 96-02 Chevy Express 1500 4.3L Upstream + Downstream 2pcs

For 2003-2006 GMC Savana 1500 4.3L Upstream Downstream O2 02 Oxygen Sensor

O2 Oxygen 02 Sensor for 96-02 Chevy Express 1500 4.3L Upstream + Downstream 2pcs