It will be up by the condenser. There are two lines that come out of the condenser on the passenger side of the vehicle. One line, usually the top one is the high pressure side. It will have a valve with a cap on it. The lower one is where the orifice filter will be located.
The wires going into the AC pump 1995 Chevy K2500 are the red-marked wires.
The amount of Freon that goes into a 1995 Chevy Suburban depends on whether or not their is just front AC or front and rear AC. If the Chevy Suburban on front AC only it takes 3.0 pounds of r134a Freon. If there is front and rear AC then it takes4.25 pounds of r134a Freon.
R134a
it's in the high pressure side of the ac line
You are low on refrigerant, google R134a...
R-134.
Low pressure valve.
There is one for the AC compressor clutch and one for the blower motor high speed.
AC CR43TS
Not wanting to allow the freon to escape into the atmosphere, you would need a garage equipped with an AC recovery system to recover the freon for you.
How do you convert the ac in a 1992 Chevy lumina
Most likely the rear expansion tube or valve is defective.