04 SLT, Another Rear HVAC Question

[C3MP69]

Ive done my searching already I know there are several topics that talk about all this stuff, but I don't have a direct answer.

Rear HVAC is stuck on cold and ceiling vents, It did blow heat about 2 weeks ago, I jumped the actuator motors out and they moved no problem. Is it the control Module between the two actuators?

Had the truck for 4 weeks now, rear hvac did work but now stuck on cold, no matter what settings you use and no matter if you use the AUX controls or front overhead controls. Ive disconnected the battery and done a few of the "re-calibration" sequences, but still nothing.

 

[C3MP69]

Nothing anyone?? Trying to make rear heat work for kiddos but I don't want to spend $$ shooting from the hip replacing parts.

 

[Mr.Joshua]

The control module is what fixed mine. I tried all of the other ideas as well.

 

[vatahoelt]

Yup, I would try the control module next.

 

[rockola1971]

I believe there is a updated control module for the rear too so be sure to get that one.

 

[mizzouguy]

x4 ^

 

[Archer04]

you need part number
ACDelco 15-73506 I will post the link to the part below. This is what fixed mine and only takes about 30 to 45 minutes to install.
https://www.amazon.com/ACDelco-15-7...=UTF8&qid=1487169366&sr=1-1&keywords=15-73506


Hope this helps.