R-134 Refrigrant.
1994 Chevy lumina freon type
It will be on the compressor also the quantity needed to fill it if it is completely empty. It is 134.
R-12
R134a
134a
Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
R134a
R134a
depends on the engine size and the transmission type.
R134a
R134a
134a