Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
R134a
r134a
R-134a
1994 Chevy lumina freon type
You can use any type of SAE certified transmission fluid in your 1997 Chevrolet Blazer. You can check the transmission fluid level with the transmission fluid dipstick.
134 freon
R134a
R134A
R134a
134a
R134a
Dex-cool it is orange-red incolor