2002 pontiac grand prix gt AC only blows hot air compressor full of freon and clutch spinning good temp control actuators working corectly narrow ac tube at firewall very cold thicker ac tube at firewall pretty warm both heater core tubes very hot engine cooling fans come on when they want with or without ac compressor running not sure about the blend doors or how to obtain access SOMEONE HELP ME IM PULLIN MY HAIR OUT

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Your compressor could be faulty. Check to see if it engages when you press the AC button with the car running.

If the compressor is working, a mechanic would check the low and high gauge pressure.
The freon has to flow thru the system to work, and the cooling fan draws air thru the condenser to get rid of the heat from inside the car.
If the ac clutch is working but the gauges show equal pressure, the compressor may be faulty.

If you have not cleaned out the ac system,the ac system will have oil in it,but,the compressor most likely does not have any in it,so pour about 4 to 5 oz in the low side opening on the compressor before installing it,and turn the center nut of the compressor clutch about 8 to 10 times,oil will try and come out the high side,when it does,this will be enough turning.If the system needs more oil,add as needed when freon is put in the system.If the oil is not added to the ac compressor before installing,the compressor could be damaged.Please rate if this was helpful,thank you.

first turn the ac off and then start the engine. you may want to lift the hood so you can hear the next step better. turn on the ac and within a couple seconds not more than 5 or so you should hear a click sound. This is the ac clutch engaging. if you don't hear a click you can double check the compressor has engaged by looking to see that the center of the ac compressor is turning with the outer pulley. if it is not most likely you don't have enough refrigerant in the system. i would suggest getting an ac pressure tester they are fairly inexpensive but this will tell you for certain if you have enough refrigerant or not.

must be low on freon

Can be the vacuum pump or most likey the AC-unit that causes that.

did you open the hp swich located on the high pressure ac lin you have to open the hp swich w/a paperclip in the harnes to open the system to accept the freon your trying to put in open the circut then fill

check the temp control switch in the dash

orfice tube stoped up or make shure motor electric fan comes on when u cut ur ac on with motor runing