2004 GMC Yukon SLT - Rear Air

[JochenWoern]

On my '04 YUK, the rear air is not blowing cold air.

Everything seems to work fine when it comes to operating the rear air, but it blows warm rather than cold air.

Any hints?

Many thanks in advance.

 

[Matt06Yukon]

Rear temperature acuator is not functioning perhaps.

 

[JochenWoern]

Rear temperature acuator is not functioning perhaps.

Many thanks.

So where is this unit located and how do I go at fixing/replacing it?

Thank you.

 

[NathanJax]

it's in the pass rear. It's really easy. there's a right up somewhere on here I'll look for.

Here's one, but it's not the one I was looking for...
http://www.tahoeyukonforum.com/forum/showthread.php?t=12635

 

[Matt06Yukon]

Its super easy to get to. Take off the rear passenger a pillar panel and then the fender cover. I have to switch mine every season, im actually in florida now and had to switch it back to a/c. Im getting kinda sick of this though and would like to just fix it. Anyone have the correct part number for the rear damper door actuator? I think its different and more expensive than any of thr normal front hvac ones. Every generic one ive tried hasn't worked.

 

[big_b_in_PA]

Ac delco #15-73506 control module kit, paid 65 on amazon last January. Works like a charm so far.

 

[Matt06Yukon]

Oh ok, that's not the one I was thinking about, what does that control? I was talking about the motor that controls the damper door, letting either hot air or cold air through.

 

[big_b_in_PA]

Oops, that's the control module, sorry, you new the actuator. I'll see if I can find it. I thought I replaced the actuator, apparently it was the control module instead. At least that was my problem.

Edit: I found the updated control module number, it is to replace the control module that was causing my issue, I originally thought my actuator was bad, but after some research, I figured out what was wrong. You may want to try taking the actuators and switching them between the blend and the vent actuator. That's how I figured out what my problem was.

Module number: 15832319

 

[JochenWoern]

Its super easy to get to. Take off the rear passenger a pillar panel and then the fender cover. I have to switch mine every season, im actually in florida now and had to switch it back to a/c. Im getting kinda sick of this though and would like to just fix it. Anyone have the correct part number for the rear damper door actuator? I think its different and more expensive than any of thr normal front hvac ones. Every generic one ive tried hasn't worked.

Please forgive my ignorance, but which is the rear passenger A Pillar Panel and which fender cover are we talking about?

Any more detail of HOW and WHAT to change would be apprecaiated.

Pictures possibly?

Many thanks.

 

[chauncey0337]

Jochen, the c pillar cover is the plastic cover inside the vehicle, just rear of the rear passenger side door-

The 'fender cover', which I have always referred to as wheel well cover, is located just rear of the c pillar cover. It's where the rear heat/ac unit is located.
Check this out and let me know if it helps-
http://tahoeyukonforum.com/forum/showthread.php?t=12635
Sorry, I just realized I posted the same thread as Nathan did.