INJECTOR, CR SYSTEM CR SYSTEM GMC (GENERAL MOTORS CORP.); Sierra 2500; Sierra 3500; Silverado; Sierra 2500 HD 6.6 09/2003 - 08/2006; Sierra 2500 HD 6.6 4x4 09/2003 - 08/2006; Sierra 3500 6.6 09/2003 - 08/2006; Sierra 3500 6.6 4x4 09/2003 - 08/2006; Sierra 3500 6.6 TD 09/2004 - 08/2006; Sierra 3500 6.6 TD 4x4 09/2004 - 08/2006; Silverado 2500 6.6 4x
