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Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
R134a
R134a
R134a
R134a
R134A
R-134a
In a 1997 Ford Aerostar : Refrigerant 134a is used
R134a
Does it have an airconditioner ? Of course it does - 134a.
R-134a
For ac freon 2.5 lbs for Radiator 2 quarts coolant rest water Wrong. There is no Freon in a 1997 Chevy. It contains R134a refrigerant. Freon was banned in the U.S. and was not used in 1997.