Buy a kit at Wal-Mart or auto parts comes with instructions
You add the refrigerant through the low side service port.
The low side port, which is the smaller one.
R134a
R134a
Freon is added into the low side port of the ac system. It should be located on the passenger side of the engine visible on an aluminum pipe.
99 Durango doesn't have a Heater Control Valve, It only has a thermostat
'99 Durango
in the dipstick hole.
A dodge Durango uses r134a refrigerant. The capacity varies depending on the year and if it has rear air.
R-134a
Freon R-134a.
How much freon does 99 Tahoe with rear ac hold