Where is the high side ac port on 2004 grandam?

On a 2004 Pontiac Grand Am, the high side A/C service port is located on the passenger side of the engine bay, near the firewall. It is typically found near the top of the A/C line connected to the compressor. To identify it, look for a smaller port that usually has a blue or black cap, distinct from the larger low side port. Always ensure the system is not under pressure before attempting to access the port.