I just took out the glove box liner and i can't see that actuator rod.

ok here is a thread you want to view and remember.......

https://www.gmforum.com/t223560/

Thanks Todd. I was doing it outside in the dark with a flashlight. I'll do it tomorrow during the day. I also realise that my compressor and the cooling fans are not coming on. Do you think this is part of the problem also?

Your A/C compressor will not come on until around 54 degrees outside. And your fans are not going to come on until your engine temp reaches 234 degrees or so as well.

i know i'm off by a little on the numbers but close.

glove box liner:



liner taken out...look through the hole on the left:



photos borrowed from other member...

Thanks for the info on the compressor and fans. So I am suppose to just push the the door to the right for full heat or disconnect the rod altogether? I am going to use a metal hanger.

How did you guys fix your nipples??? lol being serious here. When I pulled the vaccuum plug off I can see the the soft nipples are sucking closed. Is it ok If I just take off the very tip of the nipple off so that it doesnt suck closed so easily? How did you guys fix it? Thanks.

God morning Todd. Do i have to take the actuator rod off or can I just pull on it just to movr the door.
Thanks

The door has a spring on it so when the gear in the actuator breaks the door pulls itself shut to full heat. Gm'* little way of saying "we know this is going to break sometime so lets make it default to full heat so they have heat in the winter"
sometimes works sometimes not.

If I where you I would disconnect the rod from the actuator so you have heat.

But here is a little test to make for sure your actuator is broken. With the arm/rod still attached to the actuator, try moving the arm of the actuator right to left..with the rod still attached. If it moves freely than yes your air mix actuator has a broken gear and does need replacing.
If you cannot move the arm than something else failed.