For 2006 Chevrolet Silverado 2500 HD Engine Control Module Connector SMP 855BK23

For 2006 GMC Sierra 1500 HD Engine Control Module Connector SMP 752XD39

For 2001-2012 GMC Sierra 2500 HD Relay SMP 78171YW 2006 2002 2003 2004 2005 2007

For 2001-2012 GMC Sierra 2500 HD Relay SMP 33859BCZM 2002 2003 2004 2005 2006

For 2006 GMC Sierra 1500 Engine Control Module Connector SMP 854LG39

For 2006 GMC Sierra 3500 Engine Control Module Connector SMP 937MJ80

For 2001-2012 GMC Sierra 2500 HD Relay SMP 96678MPBS 2002 2003 2004 2005 2006