Where is the orifice tube located on a 93 Chevy caprice classic?

On a 1993 Chevy Caprice Classic, the orifice tube is located within the air conditioning system's high-pressure side, typically near the receiver/dryer. It's not easily accessible without removing components of the AC system. You won't see it just by looking under the hood. A shop manual or a detailed diagram of the car's AC system would be necessary to pinpoint its exact location.