Upstream Downstream for 01-2003 Chevy Impala 3.8L 02 O2 Oxygen Sensor 2pcs

2pcs for Chevy Monte Carlo 3.8L Upstream Downstream O2 Oxygen Sensor 2004-2005

02 Oxygen O2 Sensor for 04-2005 Chevy Impala 3.8L Upstream and Downstream 2pcs

2pcs O2 02 Oxygen Sensor Upstream&Downstream Fits 1997-2003 Buick LeSabre 3.8L

For 2005-2007 Buick LaCrosse 3.8L Oxygen O2 Sensor 02 Upstream+Downstream 2pcs

2pcs Upstream+Downstream for 02-03 Impala 3.8L Trailblazer 4.2L Oxygen Sensor O2

02 Oxygen O2 Sensor for 05-2007 Pontiac Grand Prix 3.8L Upstream+Downstream 2pcs