Flappers not flapping ...

[Shadowz Edge]

Hi folks.

This has been an issue since I first picked up Panda almost 2 years ago but I'm just now starting to get her worked on.

The issue I'm having is the flaps down in the control box (I think that's what it's called) that directs all the air all if not most of the flaps fallen out of their areas. At one point back then I had found a panel that has those flaps but for the life of me I can't locate it again.

Would it be good to replace just that broken panel or replace the entire box they attach to? I have yet to pull the dash out to gain access to said box so I have no clue as to it's full status.

Thank you in advance with any help.

 

[dkknaebel]

Look for my post on this page about this very thing. It quotes @east302 and his thread on fixing it.

https://www.tahoeyukonforum.com/thr...r-obs-gmt400-tahoe-yukon-today.30709/page-645

You do have to drop the dash. Most likely the blend doors have fallen in and that's why you'll get air out of all three places. The replacement box has everything you need to fix it. We were able to do mine without taking the lower box off but my dash was completely out.

 

[Shadowz Edge]

Look for my post on this page about this very thing. It quotes @east302 and his thread on fixing it.

https://www.tahoeyukonforum.com/thr...r-obs-gmt400-tahoe-yukon-today.30709/page-645

You do have to drop the dash. Most likely the blend doors have fallen in and that's why you'll get air out of all three places. The replacement box has everything you need to fix it. We were able to do mine without taking the lower box off but my dash was completely out.

Thank you so much for this info!

*Scurries off to go read and learn*

 

[dkknaebel]

Thank you so much for this info!

*Scurries off to go read and learn*

Read @Kelsda post below it as well. He has some great tips.

 

[Shadowz Edge]

Now to locate a comprehensive guide on removing the entire dash to help make the repairs easier.

 

[dkknaebel]

Now to locate a comprehensive guide on removing the entire dash to help make the repairs easier.

Not sure if someone has a write up here but this should start you out.

https://www.gmt400.com/threads/how-do-i-pull-a-99-tahoe-dash-out-please-help.7884/

 

[east302]

Here’s when I did mine...


https://www.gmt400.com/threads/dash-removal-and-replacement.38536/

 

[Shadowz Edge]

@east302 Oh I'm going to keep that tab open for when I get all the parts I need for the repair. Do you recommend any other parts for the fix other than just the flapper box?

This is what I'm going to order...

Genuine GM 52467204 Air Distributor Upper Case https://www.amazon.com/dp/B00GV8VIXI/ref=cm_sw_r_fm_apa_i_z5dXEb6G8QD3D

 

[east302]

The lower damper (26 in diagram) is GM 52471363 (Delco 15-5737) and should probably be replaced as the edges can rot. The remaining dampers come installed on the box. It’s on Amazon for $15.

The original foam on your air box is likely shot and the new one doesn’t come with it anyways. I used 1” hobby store foam and it seals up pretty well.

Minor caveat: I have no idea if this can be installed with the box still attached to the firewall. In my case, I removed the whole thing since I was replacing the evaporator as well.

 

[Shadowz Edge]

The lower damper (26 in diagram) is GM 52471363 (Delco 15-5737) and should probably be replaced as the edges can rot. The remaining dampers come installed on the box. It’s on Amazon for $15.

The original foam on your air box is likely shot and the new one doesn’t come with it anyways. I used 1” hobby store foam and it seals up pretty well.

Minor caveat: I have no idea if this can be installed with the box still attached to the firewall. In my case, I removed the whole thing since I was replacing the evaporator as well.

@east302 I hope that 15-5737 fits because according to Amazon it doesn't fit my 99 Tahoe.
I probably still going to order it anyways as it would be nice to have it and not need it rather than need it and not have it. Lol