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Where is the Orifice Tube located on a 93 Chevy Silverado 1500 Pickup?

The orifice tube on a 1993 Chevy Silverado 1500's air conditioning system is located within the air conditioning lines, typically near the receiver/dryer. It's not externally visible; you'll need to access the lines to see it. Because of its location within the AC system, replacing it requires specialized AC service tools and knowledge to avoid introducing contaminants into the system. It's not a DIY job for most people.