Review on Dorman 902025 A C Port Cap by Charlie Wilson

My only regret is that I did not find out about this product sooner as it would have saved me the expense of purchasing a Schrader valve removal tool. The schrader valve removal tool still didn't work because GM didn't use a schrader valve on the high side service port on my 2003 GMC Sierra. The little brass plug did a great job of stopping the high side service port leak. Alternatively, one could buy a new service port, vacuum pump and 3 bottles of R134A refrigerant and attempt to replace the faulty service port. Then add some R134A refrigerant to charge the unit and then plug in this plug. You will not be disappointed.