The low-pressure AC port on a 2005 Dodge Durango is typically located on the
dryer/accumulator. The dryer/accumulator is usually found near the front of the vehicle, often on the passenger side, near the firewall but it can vary slightly depending on specific trim and engine configuration. It's a smaller port than the high-pressure port, and will usually have a blue cap.
However, it's crucial to visually inspect your specific Durango's AC system. The exact location might differ slightly. A service manual specific to your year and model would provide the most accurate information. You should also consult a qualified technician for AC service as refrigerant handling requires special tools and safety precautions.
