Silverado 3500 4WD V8-6.0L VIN U (2004)
3. If equipped remove the screws from the HVAC module assembly.
4. Remove the evaporator cowl gasket from the evaporator.
5. Separate the upper HVAC module assembly (2) from the lower HVAC module assembly (1).
6. Remove the evaporator core (1) from the upper HVAC module assembly.
Installation Procedure
Important: If replacing the evaporator core, add the refrigerant oil the evaporator core.
