It is on the accumulator. It is a large silver cylindrical shaped part located by the Coolant reservoir tank (left rear quadrant if you are facing the engine). There should be a screw on/off cap protruding from the side, you can't miss it.
The service port is located on the a/c accumulator...........
The 2002 Chevy Cavalier low side service port can be found on the top of the air conditioner compressor. The low side service port will be labeled as the low pressure port.
You add the refrigerant through the low side service port.
It is under the dash on the driver side.
look right by the compressor and condenser
Its on the suction (low) side hose coming from the accumulator going to the evaporator...
The A/C low side service port is by the Firewall, just below the Passenger's Side Windshield Wiper Arm.....
The EVAP Service port is on the firewall on the passenger side, right next to the low side service port for the A/C.
The low side service port can be found on top of the air conditioner compressor. The low side service port will have a blue top.
Facing the firewall, its on the left side halfway down the firewall. It has a blue cap.
The low side service port on your 1993 Mitsubishi Eclipse can be found on top of the air conditioner compressor. The low side service port will be labeled as the low pressure port.
Try near accumulator/drier on the firewall passenger side