I just replaced the temperature blend door actuator in the rear of my 2004 GMC Yukon with auto climate controls. Before I replaced it I checked to see if the actuators were moving when I changed the settings. The mode actuator worked fine but the temperature actuator seemed to be dead so I replaced it. Nothing seems to happen with the new one either now. Even with the actuator just hanging there it still doesn't turn. I'm wondering if there's a relearn procedure for the rear actuators? I've tried the normal relearn procedure but that didn't seem to do anything for the rear. I also pulled out the rear HVAC fuse at the same time as the front HVAC fuse. I figured doing that made sense at the time. Any ideas?