04 Yukon XL AC issues

[Local Plumber]

I've got a 04 Yukon air conditioning system barely works in the front works fairly well in the back but only when I'm rolling, and getting warm as I idle. I've already replaced the radiator fan clutch water pump and thermostat as well as AC belt. Topped AC with can no leaks. Even while I'm driving if I turn on my front fan higher than minimum it will make the back AC get warmer. Front AC blows cool but not cold until I kick the fan up then it warms up as well, totally lost but I can deal with it as long as I'm moving, but being here in the Phoenix Arizona area makes for it tough day any thoughts from anyone? Thanks for your time

 

[Miami-Dade]

@Local Plumber Moved you here from intro section.
Welcome from NYC!

 

[Local Plumber]

Thanks, looks like a lot of people have a ac problems . I'm original owner of the 04 and she's been good to me till this year, so overall I think it's a damn good vehicle hope to be able to help others and get some help myself.appreciate the welcome

 

[latvius]

I'd start with getting some pressure gauges to see what the readings are. If it didn't have a leak you shouldn't need to add any freon, you want the correct amount not more or less.

 

[RAMurphy]

Welcome to this great forum. I agree with @latvius get a set of gauges and ensure you know what the readings are and what they mean. Plenty of youtube videos on this subject.