Hello all, I'm having an issue with my ac in my yukon. The rear blows cool air and the front does not. Its actually quite warm. Took the blend door actuator off under the passenger kick door and manually turned it and it still wasn't cool just really hot then when I switched it it was the same as usual. I replaced the very disgusting a/c filters with zero difference in a/c performance. I checked the freon pressure and it was in the green and when the a/c cycled on it went up into the red a bit so it seems its possibly overcharged but I don't think that's the issue as the rear does blow air conditioned air. Is there another blend door perhaps or is it maybe some sort of climate control issue? Any help is much appreciated