I found the low pressure ac port on my 2001 sable by the passenger side firewall.
You can find the air conditioning low pressure charging port on top of the air conditioning compressor. The low pressure port will be on the right hand side of the air conditioning compressor.
The low pressure air conditioner port can be found on the top of the air conditioner compressor. The low pressure port should be labeled as such.
Under the hood
You can recharge your 2003 Kia air conditioning system through the low pressure port. Connect your Freon bottle to the low pressure port. Release the Freon into the system.
Where is the low pressure side AC port on 2006 jetta 1.9 TDIRead more: Where_is_the_low_pressure_side_AC_port_on_2003_jetta_1.9_TDI
The high pressure fitting is the larger of the two. The adapters and fittings used to add refrigerant can only fit the low pressure side. I have a 2003 Silverado 2500HD and the low pressure port is just above the accumulator/ dryer on a line that attaches to the fire wall.
You can recharge your air conditioning system by putting Freon into the low pressure port. The low pressure port can be found on top of the air conditioning compressor.
It's located right on the evaporator
2, a high and a low pressure port
The low pressure service port which should be located on the receiver/dryer.
look for the port with the black cap on it, it's the low pressure port.