How many pounds of refrigerant use a Chevy Astro van?

The amount of refrigerant used in a Chevy Astro van's air conditioning system depends on the year and specific model. There's no single answer. You'll need to consult your vehicle's owner's manual or look up the specifications for your specific year and model Astro van (e.g., 1990 Chevy Astro Van, 4.3L engine) using an online parts database or a repair manual. The information will be listed as the system's refrigerant charge.