Where is the orifice tube on a 2003 envoy?

On a 2003 GMC Envoy, the orifice tube is located in the air conditioning system, typically found in the low-pressure line. To access it, you'll need to follow the aluminum line from the evaporator to the accumulator. The tube is usually situated near the accumulator or the evaporator coil. It's often necessary to disconnect the lines to replace the orifice tube.