Ac blowing out windshield vents only

[NETWORK COMMAND]

When I move my selector switch to front dash vent it doesn't work..is it a fuse? It's a 2000 GMC Yukon

 

[HiHoeSilver]

When I move my selector switch to front dash vent it doesn't work..is it a fuse? It's a 2000 GMC Yukon

Most likely it's the mode door actuator.

 

[Scottydoggs]

id give the rest a shot first, if that fails then its time to figure out what actuator went bad.

iirc the selector actuator is the easy one to get to, d/s up and in front of the console area.

 

[Scottydoggs]

this vid shows where they all are, some are real pita, dash cover has to come off duct work needs to be cut apart, but over all not the worst looking job out there.

 

[El Capitan]

Thanks to this thread I fixed mine last night, I replaced the mode actuator. You can access it from under the dash.

You will need to remove the foot vent, it is held on by one xmas tree clip.

You will also need a 7/32 u joint socket (not a 7/32 on a u joint drive, but an actual 7/32 u joint socket)

an extension

1/4in drive ratchet.

It is an absolute pita. But it fixed my a/c.

 

[Darkitec]

How the snot did you get that thing out? I've dissassembled most of the freaking dash so that I could see down there yet the geared arm appears to be holding the thing in place and I can't get it to come loose. Pound head on floor.

 

[Darkitec]

id give the rest a shot first, if that fails then its time to figure out what actuator went bad.

iirc the selector actuator is the easy one to get to, d/s up and in front of the console area.

Love the video but I've got to ask, how did you A: get that motor off of the wheel? Mine seems to be glued to it, and B: get the wheel out, there is a white gear that is preventing me from removing the wheel.

 

[El Capitan]

https://imgur.com/a/njMfbMc I was able to get to it get it out fairly easy putting it back in sucked.

 

[OneofFew]

They sometimes get stuck... lube the mechanism and give it a nudge and chances are it will work again.