What type of freon does the 1995 GMC Vandura van take?

A 1995 GMC Vandura would not use Freon (which is a trade name for chlorofluorocarbons or CFCs). By 1995, the automotive industry was phasing out CFC refrigerants due to their damage to the ozone layer. Your 1995 Vandura almost certainly uses R-134a, a hydrofluorocarbon (HFC) refrigerant.

However, it's crucial to check the sticker on your van's AC system. This sticker, usually located under the hood or on the firewall near the AC components, will definitively state the correct refrigerant type for your specific vehicle. Using the wrong refrigerant can damage the AC system.