You're quite welcome. Thanks for the update. I'll be sure to file all the information away.

 

dstegall1, I believe I am having the same problem as you. Where is the module located?

 

The module I referred to is the rear ac controller located on the back of the center console. There are several things that could be wrong. Is it just the fan not working?
Do the actuators intitialize after power removed from system? Is there a blown fuse under the rear passenger seat behind driver? Is the rear hvac atuo or manual? Do you have schematics?

 

I have problems with the blower control module back of my trailblazer 2003, he dropped liquid coolant and can not find which is the correct part number, I buy one they say is for my car but it has 7 pins and which use my car only has 4 pins in the plug, if anyone can tell me what the part number or if I can tell as I can install that I bought that has three pins more than the original

 

Hi question did you replace the rear control module and that's what fixs the problem?