Fitment:
For GMC:
2006-2010 Savana 2500 Base
2006-2010 Savana 3500 Base
2003-2005 Sierra 2500 HD Base
2006 Sierra 2500 HD SL
2003-2010 Sierra 2500 HD (submodel: SLE, SLT, WT)
2007 Sierra 2500 HD Classic (submodel: SL, SLE, SLT, WT)
2003-2005 Sierra 3500 Base
2006 Sierra 3500 SL
2004-2006 Sierra 3500 WT
2003-2006 Sierra 3500 (submodel: SLE, SLT)
2007 Sierra 3500 Classic (submodel: SL, SLE, SLT, WT)
2007-2010 Sierra 3500 HD (submodel: SLE, SLT, WT)

For Chevrolet:
2008 C4500 Kodiak (submodel: C4C042, C4C044, C4E042, C4E044, C4U042, C4V042)
2003 C5500 Kodiak (submodel: C5C042, C5E042, C5U042, C5V042)
2006-2010 Express 2500 Base
2006 Express 2500 (submodel: LS, LT)
2006-2010 Express 3500 Base
2003-2005 Silverado 2500 HD Base
2003-2006 Silverado 2500 HD LS
2003-2010 Silverado 2500 HD LT
2007-2010 Silverado 2500 HD LTZ
2004-2010 Silverado 2500 HD WT
2007 Silverado 2500 HD Classic (submodel: LS, LT, WT)
2003-2005 Silverado 3500 Base
2004,2006 Silverado 3500 WT
2003-2006 Silverado 3500 (submodel: LS, LT)
2007 Silverado 3500 Classic (submodel: LS, LT, WT)
2007-2010 Silverado 3500 HD (submodel: LT, LTZ, WT)