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

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

For 00-03 Chevy Impala 3.8L V6 O2 Oxygen 02 Sensor 2pcs Upstream&Downstream

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

2pcs for 00-03 Chevrolet Monte Carlo 3.8L Upstream Downstream Oxygen Sensor O2

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