Fitment: for Escalade ESV/EXT 2003-2014, for 2007-2013, for 1500 2500 2003-2006, for Blazer 1998-2005, for 1997-2004, for 1500/2500 HD 2003-2013, for 3500 2003-2006, for 1500 2500 2003-2014, for 2003-2014, for Trailblazer 2002-2009, for Envoy 2002-2009, for 2500 3500 2003-2004, for XL 1500 2500 2003-2014 HVAC Blend Door Actuator Replacement Part Number: 89018365, 604-106, 52402588, 16163982, 52402598, 52402612 Function: Replace the Heat Blend Door actuator to control the temperature of the air from the vents, and recirculate the outside air entering the side and foot vents of the driver and passengers in the car to keep the car cool. Material: Heater Blend Door actuator is made of quality materials, is reliable quality, , long service life. It's a good match to the original car. Easy to install. Not easy to crack. Installation: Quick and easy installation, suitable for driver and passenger side installation. After installation, don't forget to recalibrate the HVAC system. Color: Black Material: Plastic Package Contents: 2x HVAC Air Door Actuator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.