GC 01 A/C low side pressure port, where is it located?

GC 2001
The low side pressure port is located where??
The problem is the A/C port in the hood ( next to the radiator ) does'nt fit with the can hose port !! Every time i try to connect it the port doesn't lock and gas escapes!
Is there any other port maybe inside the car next to the A/C air filter !? Or it's in the hood next to the firewall .

That is indeed the low side port (by the radiator). It's trying to tell you to NOT use a death kit on your car's A/C. Seriously, A/C systems are not just a "it's not cold, lets add more refrigerant" kind of thing. Aside from the probable damage you can end up causing by adding refrigerant without diagnoising the problem, you can actually seriously harm yourself because you have no idea if the high side pressures are climbing to unsafe levels. A couple of pointers:

1) Get or rent a manifold gauge set (I hear autozone rents them for cheap or free)
2) Measure the ambient temperature directly in front of the condenser
3) Measure the center vent temperature while holding the engine at 1500 rpm (can measure the rear vent temp as well if you'd like, assuming you have rear a/c)
4) Measure the low and high side pressures with the manifold gauge set, also with the engine at 1500 rpm
5) Report back the results prior to considering adding any refrigerant.
6) Most importantly, DO NOT ADD ANY REFRIGERANT CONTAINING SEALERS!!! Read the fine print on the labels - although most mention in large print whether or not they contain them. The best stuff to use is the stuff that doesn't have anything added - pure R134a is ALL you should be adding, *IF* it is determined that you are indeed a little low. The upside is that the pure R134a is typically cheaper than all the sealer-containing stuff.

Another little test is to check your condenser airflow by spraying it with water and seeign if the low and high side pressures drop like a rock. If they do, then you have poor condenser airflow and need to at least clean it out. If not, airflow is probably not an issue.

All this assumes that the cooling system is operating correctly, but you didn't mention the specific problem you're having, so can't help a whole lot more. Good luck.

Chad

The A/C is running v good .Just i feel it's not as cold as much i want !
it' cold but i want colder ice cold :)

It's a common misconception that to get it colder, all you need to do is add a little more refrigerant. It's probably propagated because refrigerant leaks are common enough that as some leaks out, the system starts cooling poorly, and adding more is actually the correct thing to do IN THIS INSTANCE (actually you should fix the leak first). That is not always the problem though, so I guess the question becomes, do you feel lucky today?

You can do far more harm than good to your system by trying to service it blindly IMO. For the cost of a friggin gauge set and a thermometer , you can save yourself a lot of headache. Just get the readings at the given temperatures and you'll be far more prepared to determine if adding refrigerant is the correct thing to do. And you can also use that same gauge set when adding refrigerant.

FYI - these vans are pretty cold from the factory - but not all vehicles have ice cold a/c in really hot weather even when operating in tip top shape. Sometimes they can be drastically improved by changing to a far more efficient condenser type (parallel flow instead of tube and fin), something you would never have been able to achieve by just adding more refrigerant.

there are others things you should check too.

check your cabin filter, thought mine was low till i had it replaced,
belt, make sure its good,
engine strain, bad alignment, brakes dragging, all can cause transmission and engine to run hotter which will reduce ac performance,
flooring it will cause ac comp. to pause but will come back on,
low battery, low alternator(amps with load), bad ground(s), electrical issues, will reduce ac performance,

i would really check into these things before you start with adding to ac. these vans are very sensitive in the electrical department. advance auto has a new electrial tester that is much better than the machine they used to wheel out. and another penny to add is if you need all this stuff to do the ac system, adding, why not just call around and see who check it for you for the same price? like chad said, you can really do and end up causing the compr. a slow death, and/or yourself. if you have the dual ac system run all the zones together including the back...it will cool better and compr will last longer.

that my 2 :2cents: , good luck.