Chosen Solution

I have a rear blower system that, will not work I have tried replacing both control panels and it’s still not working

@bnathan , Check all your fuses/ relays for the HVAC/heater/AC/blower system as a first step. The problem may be with the rear blower wiring, burnt/corroded/plug loose, auxiliary heater resistor or blower motor itself may be faulty. Will post a few links below to show how to access the rear heater blower motor so you can test the wires at motor for power with a DVOM, also find a couple links/forums, that trouble shoot your problem. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. https://www.youtube.com/watch?v=tkkIS0hBhttps://www.youtube.com/watch?v=oeWG5hTRhttp://www.justanswer.com/chevy/3vuwy-20http://tahoeforum.com/showthread.php?t=5http://sparkys-answers.com/2011/07/2004-