Envoy 4WD V6-4.3L VIN W (1998)
Expansion Block/Orifice Tube: Service and Repair
No removal procedure is provided by the manufacturer.
The expansion (orifice) tube is located in the evaporator inlet pipe. For additional information refer to See: Hose/Line HVAC
NOTE:
You may not need to replace the expansion tube when the system diagnostics indicate a restricted expansion tube. Remove the following materials
found on the screen with compressed air:
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Metal chips
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Metal flakes
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Metal slivers
You may reuse the expansion tube under the following conditions:
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The plastic frame is not broken.
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The expansion tube is not damaged or plugged.
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The screen material is not worn.
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The screen is not plugged with fine gritty material.