Silverado 3500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
5. Remove the evaporator cowl gasket (1) from the evaporator (2).
6. Remove the evaporator core (1) from the HVAC module assembly (2).
Installation Procedure
Important: If replacing the condenser, add the refrigerant oil to the evaporator core.