2pcs Oxygen Sensor O2 for 2004-2005 Chevrolet Trailblazer 4.2L Up+Downstream

O2 Oxygen 02 Sensor for 07-09 Chevy Trailblazer 4.2L Upstream + Downstream 2pcs

2pcs Upstream & Downstream Oxygen O2 Sensor for 04-05 Chevy Trailblazer EXT 4.2L

Upstream+Downstream for Chevy Trailblazer 4.2L 02-03 Oxygen o2 02 Sensor 2pcs

O2 Oxygen 02 Sensor for 07-09 Chevy Trailblazer 4.2L Upstream + Downstream 2pcs

Oxygen O2 Sensor for 02-2003 Chevy Trailblazer 4.2L Upstream and Downstream 2pcs

2pcs for 2002-2003 GMC Envoy XL 4.2L Upstream Downstream Oxygen Sensor O2 02