2008 Cadillac SRX A/C Evaporator Core

You should remove the HVAC module, disconnect all associated wiring connections attached to the HVAC module, remove the heater core, the right side air temperature actuator and linkage, the HVAC module case screws, and the HVAC module retainer clips, separate the HVAC module case, reposition the evaporator core to access the evaporator sensor and remove the evaporator sensor and harness from the evaporator core.

The recommended torque is 3.5 Nm (31 lb in).

The recommended torque is 1 Nm (9 lb in).

Technicians should inspect the rest of the A/C system for refrigerant leaks and repair any that are found before removing the auxiliary A/C module to diagnose the block fitting and rear evaporator core. On some vehicles, leak dye may be detected in the auxiliary A/C module drain tube underneath the vehicle, but the leak may be so small that no dye is visible. If no leaks are found in any other area of the vehicle, the auxiliary A/C module should be removed and disassembled to diagnose the components inside. If the block fitting is the source of the leak, the 0-ring seals should be inspected for tears, nicks, or contamination. The block fitting and evaporator core sealing surfaces should be inspected for brazing flux and if brazing flux is found, it can be removed using a sponge tip swab dipped in alcohol.

You should remove the thermal expansion valve, the HVAC module case screws, and the HVAC module retainer clips, disconnect the HVAC Module wiring harness from the RH temperature actuator and reposition the wiring harness aside, disconnect and reposition the evaporator core temperature sensor connector and reposition aside, separate the HVAC module and remove the evaporator core and the thermistor from the evaporator core.