Upstream or Downstream For 03-06 Chevy Avalanche 2500 8.1L 02 O2 Oxygen Sensor

Upstream Downstream for 03-2006 Chevrolet Suburban 2500 8.1L Oxygen O2 02 Sensor

2pcs Fits for 01-02 GMC Sierra 3500 8.1L O2 Oxygen Sensor Upstream & Downstream

Upstream or Downstream For 03-06 Chevy Avalanche 2500 8.1L 02 O2 Oxygen Sensor

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

O2 Oxygen 02 Sensor Upstream OR Downstream For 2003-06 Chevy Suburban 2500 8.1L

Downstream for 2008-2009 Buick Allure LaCrosse 3.8L Oxygen O2 02 Sensor