2009 Chevrolet Trailblazer Heater Core

First, you need to install the upper Air Temperature Sensor. Then, please connect the electrical connector to the upper air temperature sensor. Finally, you should install the upper air temperature sensor, the HVAC control module, and the radio.

First, you need to remove the instrument panel assembly and disconnect the electrical connectors from the auxiliary Blower Motor. Then, please remove the air outlet duct from the auxiliary blower motor, remove the screws from the auxiliary blower motor, and remove the auxiliary blower motor.

First, you need to drain the engine coolant and disconnect the inlet Heater Hose from the heater core inlet tube. Then, please position the inlet heater hose clamp at the engine block. Finally, you should remove the heater inlet hose from the inlet hose fitting at the engine block and remove the heater inlet hose.