A 1987 Chevy Blazer uses R12 refrigerant as shipped from the factory. Most have been converted to the more environmentally friendly R134a.
Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
R134....But to be sure, lift the hood and there should be a sticker telling you what type of refrigerant to use.
probably no because Chevy changed the type of fuel injection and it probably operates at a different pressure.
Try here http://www.fueleconomy.gov/feg/bymake/Chevrolet1995.shtml