My 2018 Suburban Premier Flex Fuel does not want to blow cold air when idling. Last year I had a pinhole leak in the condenser, had that replaced and it worked great. About a month ago I started to notice that it wasn't blowing as cold again, I was due for an oil change so I replaced the cabin air filter like I do on every oil change and it didn't look bad. I then noticed that the rear vents blow cold air just not the front zones of the car, I also noticed the outside temp took a long time to adjust. I then replaced the ambient air temp sensor and that fixed the problem with the outside air taking so long to adjust. I am still not getting cool air out of the front 2 zones, I have tried looking for the cabin air sensor but have had no luck so far. If anyone has advice or can tell me what to try next I would appreciate the help.

Thank you,