2x O2 02 Oxygen Sensor for 2001-2002 Chevrolet Silverado 3500 8.1L Up+Downstream

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

2pcs Oxygen Sensor Upstream Downstream for 01-02 Chevrolet Silverado 3500 8.1L

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

Oxygen o2 02 Sensor Downstream for 01-2002 Chevrolet Silverado 2500 HD 3500 8.1L

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

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

2X Up/Downstream Oxygen O2 Sensor for Chevy Silverado Tahoe Buick GMC 234-4018