Hummer we have has been stuck on defrost and floor board, so I grabbed the actuator and after hours of fighting with 2 tiny bolts I swapped out the part, I now gave air only coming out of the front vents. The bolts seem like they are and the back plate did come out but I think I got it back in ok. I did the re calibrate took the power cable off for 20 minutes then attached and turned the key to run position for a few minutes (the last position before it starts the engine)

So when I look at the actuator I can see that plastic back plate move when i switch from defrost to vents or floor board. What am i missing here, is there a another component or the plastic plate is in the wrong postion. I attached 2 photos showing the bottom pin on the plate and how its moved positions when changing the vent direction. There's not even a little change in air flow.
I have a previous post on the forum about the actuators and the reset, hasnt helped me yet.


thanks ahead for any help


I foundba video but its off a 2003 gm but looks close to my hummer, half way through the video he shows a look in and he has a white attachment to the cam disc on thw top but I don't see that on mine, so I'm not sure what exactly that plastic disc is turning, it's so hard to see.

https://youtu.be/qEde2WKvyg8?si=cID2kNGyA-J1eoQe


2006 h2 hummer

 

I got it solved, there are three pins attached the vents and i think only 2 were in and 1 in the wrong slot, i spent an entire day upside down hanging half out the door before i figured out how to get the cam plate in the right spot and pull the top 2 vents into place on the plate, what a nightmare, but after a reset i now have air to all vents,
hopefully never have to do that again.

 

thanks for sharing, glad you got it figured out
thanks for updating the thread, it will help members in the future

Neal