R134a
R134a
r134a.
134
R134a
R134a
R134a
R134a
R134a
R-134
R134a
134a
It depends on the year of the truck. The old type of freon was phased out. If its an older truck it would have been R-12. But R-12 is not avalible, you will have to convert it to R-134a. Newer trucks are R-134a.