4pcs Oxygen O2 02 Sensor for 2012-15 GMC Sierra 2500 HD 6.0L Upstream Downstream

4pcs Oxygen O2 02 Sensor for 2003-06 Cadillac Escalade 6.0L Upstream Downstream

4pcs Upstream & Downstream for 2001 2002 GMC Yukon 6.0L Oxygen Sensor O2 02

2pcs Upstream+Downstream for 99-00 Chevy Silverado 2500 6.0L Oxygen Sensor O2 02

For 04-06 Cadillac Escalade 6.0L Upstream Downstream O2 02 Oxygen Sensor 2pcs

4pcs Upstream+Downstream for 03-06 Cadillac Escalade EXT 6.0 Oxygen Sensor O2 02

4pcs Upstream & Downstream for 2001 2002 GMC Yukon 6.0L Oxygen Sensor O2 02

O2 Oxygen 02 Sensor for 2001-2002 GMC Yukon 6.0L Upstream + Downstream 4pcs