Where is the low side ac port on a 2002 Pontiac Aztec?

The low side AC port on a 2002 Pontiac Aztek is located on the suction line of the air conditioning system. To find it, look near the firewall on the passenger side of the engine bay, typically close to the compressor. The port is usually capped with a blue or black plastic cap and is smaller than the high side port. Make sure to use the correct service tools when accessing it.