Dorman HVAC Blend Door Actuator Fits 2001-2006 GMC Sierra 3500 2002 2003 2004

HVAC Blend Door Actuator. HVAC Air Door Actuator. AIR DOOR ACTUATOR. 2003-2006 GMC Sierra 3500 Temperature; Position: Lower Main;. 2003-2006 GMC Sierra 3500 Temperature; Position: Upper Main;. Compatible Years: 2001 2002 2003 2004 2005 2006.