TrailBlazer 4WD L6-4.2L VIN S (2002)
Expansion Block/Orifice Tube: Service and Repair
Expansion (Orifice) Tube Replacement
Trailblazer, Envoy, and Bravada
Expansion (Orifice) Tube Replacement
Tools Required
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J 26549-E Orifice Tube Remover
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J 39400-A Halogen Leak Detector
Removal Procedure
1. Recover the refrigerant.
2. Remove the accumulator.
3. Remove the coolant reservoir.
4. Remove the evaporator tube nut (3) at the evaporator (1).
5. Remove the evaporator tube (4) from the evaporator (1).
6. Remove the O-ring seal and discard.
7. Remove the nut from the exaporator tube block fitting.
8. Separate the evaporator tubes (4,6) at the block fitting.