How do you charge ac on 2002 Cadillac?

To charge the AC on a 2002 Cadillac, first, locate the low-pressure service port, which is typically found on the larger diameter aluminum line, near the compressor. Connect a can of refrigerant with a gauge to the port, following the instructions on the can. Start the vehicle and set the AC to the maximum cool setting, then slowly add the refrigerant until the desired pressure is reached, as indicated on the gauge. Always wear safety glasses and gloves, and check for any leaks before concluding the process.