2004 gmc envoy after 20 minutes compressor stops working after car cools down you turn back on it works for about 20 minutes and turns off again !!! Help need answer why ?? freon is not low

Check ac relay.

Could be bad cycle switch. Is compressor clutch disengaging when it stops cooling?

yes clutch completing stops

i just have my fingers crossed it is not the compressor

Hopefully just bad switch. And you positive it's not low on freon?

i believe the air reply is the air blowing out of the vents and yes the air blows fine on all control numbers and vents just after 20 minutes is blows warm and the compressor shuts down !!! when vehicle cools off it will be ok for another 20 minutes and does the same thing compressor shuts off !! keeps blowing just warm air !!!!!!!!!!

positive not low on freon

Ac pressure switch,or the relay.

Vehicles has new compressor, two new pressure switches, it have right amount of freeon, but when compressor cicles off it does not comes back on

Check for proper gap in ac clutch or faulty ac clutch assy