I have an 07 SRX 8cyl that started blowing hot air out of the drivers side vents and cold air is coming out of the passenger side and rear. I have done some searching on the internet and found out it is the HVAC Panel Mode Door Actuator and part fits 07-09 Cadillac SRX ,AC Delco GM Original Equipment part # 15-73823 . I have ordered the part but was wondering if anyone can tell me where the part is located and how to install it. I have searched for videos or information but so far can find no info for my model SRX. Any feedback would be appreciated