Hvac blend door replacement

[Mickey_7106]

Hello All.

Ive got the following codes and i dont know which blend door(s) to replace. tried looking them up on a gmparts website but there's about 3 different blend door actuators. Can anyone point me in the right direction please?

B0413-04
B0433-04
B3782-04

2009 Yukon Xl. has passenger and rear climate controls if that matters

Thanks

 

[Doubeleive]

based on those codes it sounds like you need to replace both the upper and lower actuators on the airbox
but those codes can be present even if it only screws up a couple times (code+ error count), a visual inspection and test is what I would do.
the main actuator is easy to get to under the glove box, just loosen or remove the lower kick panel requires a (7mm socket)
to access the auxiliary actuator (passenger side-heat/cold) it is on top of the airbox and the passenger airbag needs to be removed.

 

[Mickey_7106]

awesome, thanks for the video!

 

[OR VietVet]

There are step by step reset/reprogram videos at you tube that you can attempt first. Watch 2 or 3 to see which one gives the best steps and clear information.

 

[j91z28d1]

based on those codes it sounds like you need to replace both the upper and lower actuators on the airbox
but those codes can be present even if it only screws up a couple times (code+ error count), a visual inspection and test is what I would do.
the main actuator is easy to get to under the glove box, just loosen or remove the lower kick panel requires a (7mm socket)
to access the auxiliary actuator (passenger side-heat/cold) it is on top of the airbox and the passenger airbag needs to be removed.

so you happen to know off the top of your head if the recirculation one is easy to reach? mines gotten noisy. I'm sure it will fail at some point but I keep forgetting to check into it.

 

[Doubeleive]

so you happen to know off the top of your head if the recirculation one is easy to reach? mines gotten noisy. I'm sure it will fail at some point but I keep forgetting to check into it.

I have not done one but it depends on your definition of easy it can be accessed from the under drivers side footwell, people have done it so it can be done others have opted to pull the dash which to me is a insane amount of extra work
if you move the drivers seat all the way back and get down on the floor in the drivers footwell and shine a flashlight up under towards the front center of the dash you can see it there.

 

[swathdiver]