Review on 🔧 Air Door Actuator - Enhanced Replacement for 15-73952, 52495593, 89018374, 604-112 - Fits Chevy, GMC, Cadillac & Hummer Models 2003-2014 - HVAC Blend Control Actuator - Air Heater Blend Door by Derrick Shah

It was exactly as advertised. However, I never installed it as I found that I could recalibrate the HVAC system as follows: 1. Go to the underhood fuse box and unplug the 10 amp fuses for HVAC2. turn the key to the vehicle for 20-30 seconds then turn it off 3. swap the fuses 4. turn the key to the car again and you will hear the HVAC actuators being recalibrated5. Turn the key off, replace the fuse cover and close the hood. My car had an issue with the side vents on the driver's side losing cool air after a while when the mixer drive finally closed. the passenger side was always cold. After I followed the steps above, the problem disappeared. Now I have a spare part on my shelf.