4X O2 Oxygen Sensor For Silverado 2003 2004 2005 2006 2007 GMC Sierra 2500 6.0L

4X O2 Oxygen Sensor For Chevy Silverado 2003-2007 GMC Sierra 2500HD 6.0L. 2003-2004 GMC Sierra 2500 (V8, 6.0L) (Base; SLE; SLT; WT). 2003-2004 Chevrolet Silverado 2500 (V8, 6.0L) (Base; LS; LT). 2003-2005 GMC Sierra 2500 HD (V8, 6.0L) (Base).