Replacement Air Door Actuator - The air door actuator controls the flow of air into the interior of the vehicle (lower vents, dash vents, defroster). This part commonly fails on Chevy Silverado and Chevy Tahoe models and results in inconsistent or incorrect air flow inside the vehicle. It can also cause air to be directed to the incorrect location such as the vents by your feet rather than the vents on the dash or incorrect temperatures. Replaces part # 15-73952, 52495593, 89018374, 604-112, 604112 - While this is not a genuine GM part it is a direct replacement for the factory blend door actuator. Fits popular Chevy models including - Chevy Silverado 2003, Chevy Silverado 2008, 2010 Silverado, 2005 Chevy Silverado, Chevy Tahoe 2004, Chevy Tahoe 2003, and more see below for all models Fits the following vehicles - 2003-2013 Chevy Silverado, 2003-2014 Chevy Tahoe, 2003-2011 Chevy Avalanche, 2003-2013 GMC Sierra, Yukon, Yukon XL, 2003-2014 Cadillac Escalade, 2008-2009 Hummer H2 This blend door or air door actuator features a redesigned housing to insure it lasts longer than the factory blend door on your Chevy. The blend door actuator also features a more rugged internal circuit board which resists heat, corrosion, and vibration. LIFETIME WARRANTY - This air door actuator comes complete with a lifetime warranty. If the part ever fails simply contact us for a replacement.