Blend Door

[ccmd2b]

I have a 01 Yukon that is stuck on hot/red on the thermostat. Even when you turn it back to the cold/blue it's still is max hot air. I was told that my blend door needs to be replaced. When I looked, it seems there is 3 of them. My rear adjustment still works fine so it's just the front control that's broken. Does anyone know which of the 3 blend doors need to be replaced?

Thank you

 

[jpmaniac87]

The front. If you remove the plastic piece under the middle/passenger dash, you will see the blend door actuator plugged in. just unplug and remove. But to install the new one, you will have to recalibrate. I didn't recalibrate mine correctly nor do i remember exactly what to do (unplug hvac fuses at certain times or something like that) so I hope someone else can chime in with that.