Scuze my egnertz but what is an AC valve? Also,have U put a set of gauges on the system, if so, what are the readings at what ambient temperature? Have you checked the blend doors for binding, sticking, not opening/closing etc.?
Btw, where are you from?
Although it doesn't quite sound like a leak, here's some leakage info:
1st generation Traverses are susceptible to 3 AC leakage locations.
1. A hose in the engine compartment that rubs on something. This should be fairly easy to see.
2. The AC lines that run from the front of the car to the rear. These can be damaged by running over debris in the road. Note that the 2 AC and 2 coolant (i.e., heater) lines come as a single unit and must be replaced as a single unit.
3. The rear evaporator. The problem here is that copper particles from the fan's brushes get on the evaporator and cause pinhole leaks. This one definitely needs to have a dye added to the refrigerant in order to find the leak. (I just had this problem last fall on my 2017.)
"im from the middleast(KSA to be exact)"
Where is KSA?.......and, welcome to the forum,it will,more than likely, solve your problem.
