Mr. Gasket Ultra Seal Header Gaskets 5964 light bulbs B EO #: D 698 5 data acquisition components B EO #: D 698 5 RPO Code JH6 or JH7 2001 2003 GMC Sierra 1500 HD 2005 2006 GMC Sierra 1500 HD RPO Code JH6 or JH7 2007 GMC Sierra 1500 HD Classic 1999 2004 GMC Sierra 2500 2001 2004 GMC Sierra 2500 HD 2005 2006 GMC Sierra 2500 HD RPO Code JH6 or JH7 2007 GMC Sierra 2500 HD Classic RPO Code JH6 or JH7 2001 2004 GMC Sierra 3500 2005 2006 GMC Sierra 3500 RPO Code JH6 or JH7 2007 GMC Sierra 3500 Classic RPO Code JH6 or JH7 2000 2004 GMC Yukon XL 2500 2005 2006 GMC Yukon XL 2500 RPO Code JH6 or JH7 2003 2004 Hummer H2 2005 2007 Hummer H2 RPO Code JH6 or JH7 Interchange: Can be trimmed if necessary for modified port applications drag race and oval track use