Circuit/System Verification
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, observe the scan tool A/C Evaporator Temperature Sensor parameter. The reading should be between -35 and +98°C (-39 and +208°F) and change with evaporator air temperature changes.