KGallison

Did chevy change the size of the low pressure port ? I cannot add ac Freon to a 2017 chvey suburban

tech2

check the ac refrigerant label under the hood. It will list the refrigerant type. If the refrigerant is r1234yf...the service ports will be a different type. They change the port so the wrong refrigerant won't be added and contaminate the system.