How do you fix the driver side air blend door actuator?

The common cause of this is a failed air temperature control. blend door and or the electric actuator that moves it. The dealer can do a test scan to confirm this, the repair is very expensive if the blend door is the cause and it has burnt out the actuator motor because the door is warped and jammed, which is the most common cause.

I would pull off the blend door actuator and swap it out with a new one. Or another option is to swap it out with one of the other actuators. The blend door actuator is interchangeable with the actuators for the mode-air doors and the recirculation-air door.

Disconnect and isolate the negative battery cable.

If equipped, remove the silencer from below the driver side of the instrument panel.

Disconnect the wire harness connector from the blend door actuator located on the driver side of the air distribution housing.

Remove the two screws that secure the blend door actuator to the actuator mounting bracket and remove the actuator

Could be the HVAC control processor is malfunctioning.Wtihout testing that would just be a guess .
2003 Tahoe No Rear Heat Fix Suburban Yukon XL Repair

They are not vac on the h2. there is 2 for temp control, one for recirc and one for blend. check the hummer forum as there is a great read for it there. the driver side actuator is really ez as it's under the glovebox, 20 min fix. the rest take removing the whole dash but it's not that tough.

I'm having the same problem except on mine it's the driver's side that's blowing cold. Do you have the pictures in a finer resolution? I can't make them out and when I zoom, they are too grainy. Does the replacement require removing the dashboard? What's the general cost of the acuators? Are they readily available at like NAPA or other parts stores?

This is an unrelated and additional issue that must be diagnosed. The first was a blend door actuator.

I am having the exact same problem in my 04 tahoe. DO NOT replace the switch panel. It costs around $140 and will not fix it. I am going to try the main blend door actuator this weekend, but I'm not certain it will fix it. From what I see on the schematics there are several actuators but I believe only 2 control the blend and the other two control the direction. I have been reading that this is a very common problem that can cost in the upwards of $1000 to get it fixed at the dealership. I'll let you know if replacing the main blend door actuator fixes the problem

I believe that the right side has a blend door actuator, and the left side or driver side just gets air from the regular flow from the programmer and vacuum motors.

Dorman/Blend Door Actuator
Part Number:
604-106 Price: $139.99
Notes: Dorman-OE SolutionsTemperature door. Right

This is probably due to a faulty blend door or blend door actuator. The blend door is a device inside the dash that directs the air flow to the desired vent. Sometimes they will fail, but usually is an actuator. Unfortunately, you will have to remove the dash to see if this is the problem. If you have never removed the dash on a Yukon, you are in for a very big job. Here is also some good information

EASY FIX-- your blend door actuator has a grease drip inside on a sensor. It's a easy fix. I just fixed mine in 20 minutes. See how to here==> http://www.tahoeyukonforum.com/forum/showthread.php?t=17741