first I'm new in there and I'm grateful for the forum community.
i have trailblazer 08 that started blowing hot air from passenger side and cold air from passenger side when turning A/C on.
i tried all the calibration, battery off but it seems that i need to change the actuator based on research on the forum.
my question is what is the correct OEM part number for the actuator, also are the ac delco 15-73596 and 15-73598 interchangeable?
and just to be sure is it the bottom actuator that is near the radio or the far up in there.
Thanks in advance guys