R134a
134a is the refrigerant used by most vehicles made after 1995
Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
It depends on the year of the car. From 1994 on, R134a refrigerant is used. Prior to that, they used R12 refrigerant (Freon). R134a is technically not "Freon". Be alert, however, as many older cars (like my 1986 Camry) have been retro-fitted with R134a systems, and can no longer accept Freon, as the two refrigerants are not compatible.
134. Freon 12 has been out of use over a decade.
R134a
R134A
R-134a
In a 1997 Ford Aerostar : Refrigerant 134a is used
Would have been built for R12, can be converted to R134a.
R134a
you'll want to convert to 134 anyway, and there is a complete kit available at Pep Boys (and other parts stores) called Air conditioning for DUMMIES..includes freon and fittings etc...pretty cool kit..:)