Downstream:
Compatible With Chevy
2005-2007 Equinox 3.4L V6;
2006 2007 Impala 3.5L V6;
2004 2005 Impala 3.8L V6
2004-2007 Malibu 3.5L V6;
2002 2003 2005 2006 Silverado 1500 HD 6.0L V8;
2003 2004 Silverado 2500 6.0L V8
2002-2004 2006 2007 Silverado 2500 HD 6.0L V8;
2003 2004 2005 Silverado 3500 6.0L V8
2002-2006 Suburban 2500 6.0L V8;
2003-2005 Trailblazer EXT 5.3L V8;
Compatible With GMC
2002-2003 2005 2006 Sierra 1500 HD 6.0L V8;
2002-2007 Sierra 2500 HD 6.0L V8
2002 2003 2005 2006 Sierra 3500 6.0L V8;
2002-2004 Sierra 2500 6.0L V8
2003-2006 Yukon 6.0L V8;
2004-2006 Yukon XL 1500 6.0L V8;
2002 2003 Yukon XL 2500 6.0L V8;
2003-2005 Envoy XL 5.3L V8;
2004 2005 Envoy XUV 5.3L V8
Downstream/Upstream:
Compatible With Chevy
2003-2007 Express 1500 5.3L V8;
2003-2006 Express 1500 4.3L V6
2003-2007 Express 2500 4.8L V8;
2002-2007 Express 2500 6.0L V8;
2003-2005 Express 2500 4.3L V6
2003-2005 Express 2500 5.3L V8;
2005-2007 Express 3500 4.8L V8;
2002-2007 Express 3500 6.0L V8
2003-2005 2007 Silverado 1500 4.8L V8;
2004-2007 Silverado 1500 6.0L V8;
2003-2006 Silverado 1500 4.3L V6
Compatible With GMC
2003-2007 Savana 1500 5.3L V8
2003-2006 Savana 1500 4.3L V6
2003-2007 Savana 2500 4.8L V8
2003-2007 Savana 2500 6.0L V8
2003-2005 Savana 2500 4.3L V6
2003-2005 Savana 2500 5.3L V8
2005-2007 Savana 3500 4.8L V8
2005-2007 Savana 3500 6.0L V8
2003-2005 2007 Sierra 1500 4.8L V8
2004-2007 Sierra 1500 6.0L V8
2003-2006 Sierra 1500 4.3L V6